diff --git a/src/lv_api_map.h b/src/lv_api_map.h
index 904dcf93d..fde6f1633 100644
--- a/src/lv_api_map.h
+++ b/src/lv_api_map.h
@@ -31,18 +31,6 @@ extern "C" {
  * V6.0 COMPATIBILITY
  *--------------------*/
 
-
-#if LV_USE_ARC
-
-
-static inline void lv_arc_set_angles(lv_obj_t * arc, uint16_t start, uint16_t end)
-{
-    lv_arc_set_start_angle(arc, start);
-    lv_arc_set_end_angle(arc, end);
-}
-
-#endif
-
 #if LV_USE_CHART
 
 #define lv_chart_get_point_cnt lv_chart_get_point_count
diff --git a/src/lv_core/lv_obj.c b/src/lv_core/lv_obj.c
index 09bb104cd..9b76a5628 100644
--- a/src/lv_core/lv_obj.c
+++ b/src/lv_core/lv_obj.c
@@ -473,10 +473,12 @@ void lv_obj_clean(lv_obj_t * obj)
 }
 
 /**
- * Mark the object as invalid therefore its current position will be redrawn by 'lv_refr_task'
+ * Mark an area of an object as invalid.
+ * This area will be redrawn by 'lv_refr_task'
  * @param obj pointer to an object
+ * @param area the area to redraw
  */
-void lv_obj_invalidate(const lv_obj_t * obj)
+void lv_obj_invalidate_area(const lv_obj_t * obj, const lv_area_t * area)
 {
     LV_ASSERT_OBJ(obj, LV_OBJX_NAME);
 
@@ -487,31 +489,56 @@ void lv_obj_invalidate(const lv_obj_t * obj)
     lv_disp_t * disp   = lv_obj_get_disp(obj_scr);
     if(obj_scr == lv_disp_get_scr_act(disp) || obj_scr == lv_disp_get_layer_top(disp) ||
        obj_scr == lv_disp_get_layer_sys(disp)) {
-        /*Truncate recursively to the parents*/
-        lv_area_t area_trunc;
-        lv_obj_t * par = lv_obj_get_parent(obj);
-        bool union_ok  = true;
-        /*Start with the original coordinates*/
-        lv_coord_t ext_size = obj->ext_draw_pad;
-        lv_area_copy(&area_trunc, &obj->coords);
-        area_trunc.x1 -= ext_size;
-        area_trunc.y1 -= ext_size;
-        area_trunc.x2 += ext_size;
-        area_trunc.y2 += ext_size;
 
-        /*Check through all parents*/
+        /*Truncate the area to the object*/
+        lv_area_t obj_coords;
+        lv_coord_t ext_size = obj->ext_draw_pad;
+        lv_area_copy(&obj_coords, &obj->coords);
+        obj_coords.x1 -= ext_size;
+        obj_coords.y1 -= ext_size;
+        obj_coords.x2 += ext_size;
+        obj_coords.y2 += ext_size;
+
+        bool is_common;
+        lv_area_t area_trunc;
+
+        is_common = lv_area_intersect(&area_trunc, area, &obj_coords);
+        if(is_common == false) return;  /*The area is not on the object*/
+
+        /*Truncate recursively to the parents*/
+        lv_obj_t * par = lv_obj_get_parent(obj);
         while(par != NULL) {
-            union_ok = lv_area_intersect(&area_trunc, &area_trunc, &par->coords);
-            if(union_ok == false) break;       /*If no common parts with parent break;*/
+            is_common = lv_area_intersect(&area_trunc, &area_trunc, &par->coords);
+            if(is_common == false) break;       /*If no common parts with parent break;*/
             if(lv_obj_get_hidden(par)) return; /*If the parent is hidden then the child is hidden and won't be drawn*/
 
             par = lv_obj_get_parent(par);
         }
 
-        if(union_ok) lv_inv_area(disp, &area_trunc);
+        if(is_common) lv_inv_area(disp, &area_trunc);
     }
 }
 
+/**
+ * Mark the object as invalid therefore its current position will be redrawn by 'lv_refr_task'
+ * @param obj pointer to an object
+ */
+void lv_obj_invalidate(const lv_obj_t * obj)
+{
+    LV_ASSERT_OBJ(obj, LV_OBJX_NAME);
+
+    /*Truncate the area to the object*/
+    lv_area_t obj_coords;
+    lv_coord_t ext_size = obj->ext_draw_pad;
+    lv_area_copy(&obj_coords, &obj->coords);
+    obj_coords.x1 -= ext_size;
+    obj_coords.y1 -= ext_size;
+    obj_coords.x2 += ext_size;
+    obj_coords.y2 += ext_size;
+
+    lv_obj_invalidate_area(obj, &obj_coords);
+
+}
 /*=====================
  * Setter functions
  *====================*/
diff --git a/src/lv_core/lv_obj.h b/src/lv_core/lv_obj.h
index 57b1451ac..58bf4f4ab 100644
--- a/src/lv_core/lv_obj.h
+++ b/src/lv_core/lv_obj.h
@@ -365,6 +365,15 @@ void lv_obj_del_async(struct _lv_obj_t *obj);
  */
 void lv_obj_clean(lv_obj_t * obj);
 
+
+/**
+ * Mark an area of an object as invalid.
+ * This area will be redrawn by 'lv_refr_task'
+ * @param obj pointer to an object
+ * @param area the area to redraw
+ */
+void lv_obj_invalidate_area(const lv_obj_t * obj, const lv_area_t * area);
+
 /**
  * Mark the object as invalid therefore its current position will be redrawn by 'lv_refr_task'
  * @param obj pointer to an object
diff --git a/src/lv_core/lv_refr.c b/src/lv_core/lv_refr.c
index 12429ce88..c925b9412 100644
--- a/src/lv_core/lv_refr.c
+++ b/src/lv_core/lv_refr.c
@@ -533,6 +533,7 @@ static void lv_refr_obj(lv_obj_t * obj, const lv_area_t * mask_ori_p)
 
 #if MASK_AREA_DEBUG
         static lv_color_t debug_color = LV_COLOR_RED;
+<<<<<<< HEAD
         lv_draw_rect_dsc_t draw_dsc;
         lv_draw_rect_dsc_init(&draw_dsc);
         draw_dsc.bg_color.full = debug_color.full;
@@ -541,6 +542,14 @@ static void lv_refr_obj(lv_obj_t * obj, const lv_area_t * mask_ori_p)
         draw_dsc.border_color.full = (debug_color.full + 0x13) * 9;
 
         lv_draw_rect(&obj_ext_mask, &obj_ext_mask, &draw_dsc);
+=======
+        LV_STYLE_CREATE(style_debug, &lv_style_plain);
+        style_debug.body.main_color = debug_color;
+        style_debug.body.grad_color = debug_color;
+        style_debug.body.border.width = 2;
+        style_debug.body.border.color.full = (debug_color.full + 0x13) * 9;
+        lv_draw_rect(&obj_ext_mask, &obj_ext_mask, &style_debug, LV_OPA_20);
+>>>>>>> dev-7.0
         debug_color.full *= 17;
         debug_color.full += 0xA1;
 #if LV_COLOR_DEPTH == 32
diff --git a/src/lv_draw/lv_draw_arc.c b/src/lv_draw/lv_draw_arc.c
index 37599d12c..08476e31b 100644
--- a/src/lv_draw/lv_draw_arc.c
+++ b/src/lv_draw/lv_draw_arc.c
@@ -96,7 +96,7 @@ void lv_draw_arc(lv_coord_t center_x, lv_coord_t center_y, uint16_t radius,  uin
     if(end_angle > start_angle) {
         angle_gap = 360 - (end_angle - start_angle);
     } else {
-        angle_gap = end_angle - start_angle;
+        angle_gap = start_angle - end_angle;
     }
     if(angle_gap > SPLIT_ANGLE_GAP_LIMIT && radius > SPLIT_RADIUS_LIMIT) {
         /*Handle each quarter individually and skip which is empty*/
@@ -217,7 +217,7 @@ static void draw_quarter_1(quarter_draw_dsc_t * q)
         quarter_area.y2 = q->center_y + ((lv_trigo_sin(q->start_angle) * (q->radius)) >> LV_TRIGO_SHIFT);
         quarter_area.x2 = q->center_x + ((lv_trigo_sin(q->start_angle + 90) * (q->radius - q->width)) >> LV_TRIGO_SHIFT);
 
-        quarter_area.y1 = q->center_y + ((lv_trigo_sin(q->end_angle) * q->radius - q->width) >> LV_TRIGO_SHIFT);
+        quarter_area.y1 = q->center_y + ((lv_trigo_sin(q->end_angle) * (q->radius - q->width)) >> LV_TRIGO_SHIFT);
         quarter_area.x1 = q->center_x + ((lv_trigo_sin(q->end_angle + 90) * (q->radius)) >> LV_TRIGO_SHIFT);
 
         bool ok = lv_area_intersect(&quarter_area, &quarter_area, q->clip_area);
@@ -302,7 +302,7 @@ static void draw_quarter_2(quarter_draw_dsc_t * q)
     else if((q->start_quarter == q->end_quarter && q->start_quarter != 2 && q->end_angle < q->start_angle) ||
             (q->start_quarter == 0 && q->end_quarter == 3) ||
             (q->start_quarter == 1 && q->end_quarter == 3) ||
-            (q->start_quarter == 3 && q->end_quarter == 1)) {
+            (q->start_quarter == 1 && q->end_quarter == 0)) {
         /*Arc crosses here*/
         quarter_area.x1 = q->center_x - q->radius;
         quarter_area.y1 = q->center_y - q->radius;
@@ -325,7 +325,7 @@ static void draw_quarter_3(quarter_draw_dsc_t * q)
         quarter_area.y1 = q->center_y + ((lv_trigo_sin(q->start_angle) * (q->radius)) >> LV_TRIGO_SHIFT);
 
         quarter_area.x2 = q->center_x + ((lv_trigo_sin(q->end_angle + 90) * (q->radius)) >> LV_TRIGO_SHIFT);
-        quarter_area.y2 = q->center_y + ((lv_trigo_sin(q->end_angle) * q->radius - q->width) >> LV_TRIGO_SHIFT);
+        quarter_area.y2 = q->center_y + ((lv_trigo_sin(q->end_angle) * (q->radius - q->width)) >> LV_TRIGO_SHIFT);
 
         bool ok = lv_area_intersect(&quarter_area, &quarter_area, q->clip_area);
         if(ok) lv_draw_rect(q->draw_area, &quarter_area, q->draw_dsc);
@@ -369,8 +369,6 @@ static void draw_quarter_3(quarter_draw_dsc_t * q)
 }
 
 
-
-
 static void get_rounded_area(int16_t angle, lv_coord_t radius, uint8_t tickness, lv_area_t * res_area)
 {
     const uint8_t ps = 8;
diff --git a/src/lv_font/lv_font_fmt_txt.c b/src/lv_font/lv_font_fmt_txt.c
index 947d80bef..04829948c 100644
--- a/src/lv_font/lv_font_fmt_txt.c
+++ b/src/lv_font/lv_font_fmt_txt.c
@@ -269,7 +269,7 @@ static int8_t get_kern_value(const lv_font_t * font, uint32_t gid_left, uint32_t
         /*Kern classes*/
         const lv_font_fmt_txt_kern_classes_t * kdsc = fdsc->kern_dsc;
         uint8_t left_class = kdsc->left_class_mapping[gid_left];
-        uint8_t right_class = kdsc->left_class_mapping[gid_right];
+        uint8_t right_class = kdsc->right_class_mapping[gid_right];
 
         /* If class = 0, kerning not exist for that glyph
          * else got the value form `class_pair_values` 2D array*/
@@ -489,5 +489,5 @@ static uint8_t rle_next(void)
  */
 static int32_t unicode_list_compare(const void * ref, const void * element)
 {
-    return (*(uint16_t *)ref) - (*(uint16_t *)element);
+    return ((int32_t)(*(uint16_t *)ref)) - ((int32_t)(*(uint16_t *)element));
 }
diff --git a/src/lv_font/lv_symbol_def.h b/src/lv_font/lv_symbol_def.h
index 43a6a29ca..db5c3dfe5 100644
--- a/src/lv_font/lv_symbol_def.h
+++ b/src/lv_font/lv_symbol_def.h
@@ -9,12 +9,12 @@ extern "C" {
 #include "../lv_conf_internal.h"
 
 /* In the font converter use this list as range:
-      61441, 61448, 61451, 61452, 61452, 61453, 61457, 61459, 61461, 61465,
-      61468, 61473, 61478, 61479, 61480, 61502, 61512, 61515, 61516, 61517,
-      61521, 61522, 61523, 61524, 61543, 61544, 61550, 61552, 61553, 61556,
-      61559, 61560, 61561, 61563, 61587, 61589, 61636, 61637, 61639, 61671,
-      61674, 61683, 61724, 61732, 61787, 61931, 62016, 62017, 62018, 62019,
-      62020, 62087, 62099, 62212, 62189, 62810, 63426, 63650
+      61441, 61448, 61451, 61452, 61453, 61457, 61459, 61461, 61465, 61468,
+      61473, 61478, 61479, 61480, 61502, 61512, 61515, 61516, 61517, 61521,
+      61522, 61523, 61524, 61543, 61544, 61550, 61552, 61553, 61556, 61559,
+      61560, 61561, 61563, 61587, 61589, 61636, 61637, 61639, 61671, 61674,
+      61683, 61724, 61732, 61787, 61931, 62016, 62017, 62018, 62019, 62020,
+      62087, 62099, 62212, 62189, 62810, 63426, 63650
 */
 
 #define LV_SYMBOL_AUDIO           "\xef\x80\x81" /*61441, 0xF001*/
@@ -90,7 +90,6 @@ enum {
     _LV_STR_SYMBOL_CLOSE,
     _LV_STR_SYMBOL_POWER,
     _LV_STR_SYMBOL_SETTINGS,
-    _LV_STR_SYMBOL_TRASH,
     _LV_STR_SYMBOL_HOME,
     _LV_STR_SYMBOL_DOWNLOAD,
     _LV_STR_SYMBOL_DRIVE,
@@ -110,6 +109,8 @@ enum {
     _LV_STR_SYMBOL_RIGHT,
     _LV_STR_SYMBOL_PLUS,
     _LV_STR_SYMBOL_MINUS,
+    _LV_STR_SYMBOL_EYE_OPEN,
+    _LV_STR_SYMBOL_EYE_CLOSE,
     _LV_STR_SYMBOL_WARNING,
     _LV_STR_SYMBOL_SHUFFLE,
     _LV_STR_SYMBOL_UP,
@@ -122,6 +123,7 @@ enum {
     _LV_STR_SYMBOL_COPY,
     _LV_STR_SYMBOL_SAVE,
     _LV_STR_SYMBOL_CHARGE,
+    _LV_STR_SYMBOL_PASTE,
     _LV_STR_SYMBOL_BELL,
     _LV_STR_SYMBOL_KEYBOARD,
     _LV_STR_SYMBOL_GPS,
@@ -132,7 +134,12 @@ enum {
     _LV_STR_SYMBOL_BATTERY_2,
     _LV_STR_SYMBOL_BATTERY_1,
     _LV_STR_SYMBOL_BATTERY_EMPTY,
+    _LV_STR_SYMBOL_USB,
     _LV_STR_SYMBOL_BLUETOOTH,
+    _LV_STR_SYMBOL_TRASH,
+    _LV_STR_SYMBOL_BACKSPACE,
+    _LV_STR_SYMBOL_SD_CARD,
+    _LV_STR_SYMBOL_NEW_LINE,
     _LV_STR_SYMBOL_DUMMY,
 };
 
diff --git a/src/lv_misc/lv_color.h b/src/lv_misc/lv_color.h
index 465884897..b045ce568 100644
--- a/src/lv_misc/lv_color.h
+++ b/src/lv_misc/lv_color.h
@@ -340,7 +340,6 @@ static inline uint8_t lv_color_to8(lv_color_t color)
 
 static inline uint16_t lv_color_to16(lv_color_t color)
 {
-
 #if LV_COLOR_DEPTH == 1
     if(color.full == 0)
         return 0;
@@ -369,9 +368,7 @@ static inline uint16_t lv_color_to16(lv_color_t color)
 #endif
     LV_COLOR_SET_B16(ret, LV_COLOR_GET_B(color) >> 3);  /* 8 - 5  = 3*/
     return ret.full;
-#endif
-
-    return 0;
+#endif                         
 }
 
 static inline uint32_t lv_color_to32(lv_color_t color)
diff --git a/src/lv_objx/lv_arc.c b/src/lv_objx/lv_arc.c
index 4081c060b..5696b5d12 100644
--- a/src/lv_objx/lv_arc.c
+++ b/src/lv_objx/lv_arc.c
@@ -29,6 +29,7 @@
 static lv_design_res_t lv_arc_design(lv_obj_t * arc, const lv_area_t * clip_area, lv_design_mode_t mode);
 static lv_res_t lv_arc_signal(lv_obj_t * arc, lv_signal_t sign, void * param);
 static lv_style_list_t * lv_arc_get_style(lv_obj_t * arc, uint8_t part);
+static void inv_arc_area(lv_obj_t * arc, uint16_t start_angle, uint16_t end_angle);
 
 /**********************
  *  STATIC VARIABLES
@@ -128,11 +129,25 @@ void lv_arc_set_start_angle(lv_obj_t * arc, int16_t start)
     lv_arc_ext_t * ext = lv_obj_get_ext_attr(arc);
 
     if(start > 360) start -= 360;
-    if(start < 0) start += 360;
+
+    /*Too large move, the whole arc need to be invalidated anyway*/
+    if(LV_MATH_ABS(start - ext->arc_angle_start) >= 180) {
+        lv_obj_invalidate(arc);
+    }
+    /*Only a smaller incremental move*/
+    else if(ext->arc_angle_start > ext->arc_angle_end && start > ext->arc_angle_end) {
+        inv_arc_area(arc, LV_MATH_MIN(ext->arc_angle_start, start), LV_MATH_MAX(ext->arc_angle_start, start));
+    }
+    /*Only a smaller incremental move*/
+    else  if(ext->arc_angle_start < ext->arc_angle_end && start < ext->arc_angle_end) {
+        inv_arc_area(arc, LV_MATH_MIN(ext->arc_angle_start, start), LV_MATH_MAX(ext->arc_angle_start, start));
+    }
+    /*Crossing the start angle makes the whole arc change*/
+    else {
+        lv_obj_invalidate(arc);
+    }
 
     ext->arc_angle_start = start;
-
-    lv_obj_invalidate(arc);
 }
 
 /**
@@ -147,11 +162,49 @@ void lv_arc_set_end_angle(lv_obj_t * arc, int16_t end)
     lv_arc_ext_t * ext = lv_obj_get_ext_attr(arc);
 
     if(end > 360) end -= 360;
-    if(end < 0) end += 360;
+
+    /*Too large move, the whole arc need to be invalidated anyway*/
+    if(LV_MATH_ABS(end - ext->arc_angle_end) >= 180) {
+        lv_obj_invalidate(arc);
+    }
+    /*Only a smaller incremental move*/
+    else if(ext->arc_angle_end > ext->arc_angle_start && end > ext->arc_angle_start ) {
+        inv_arc_area(arc, LV_MATH_MIN(ext->arc_angle_end, end), LV_MATH_MAX(ext->arc_angle_end, end));
+    }
+    /*Only a smaller incremental move*/
+    else  if(ext->arc_angle_end < ext->arc_angle_start && end < ext->arc_angle_start ) {
+        inv_arc_area(arc, LV_MATH_MIN(ext->arc_angle_end, end), LV_MATH_MAX(ext->arc_angle_end, end));
+    }
+    /*Crossing the end angle makes the whole arc change*/
+    else {
+        lv_obj_invalidate(arc);
+    }
 
     ext->arc_angle_end= end;
+}
 
-    lv_obj_invalidate(arc);
+
+/**
+ * Set the start and end angles
+ * @param arc pointer to an arc object
+ * @param start the start angle
+ * @param end the end angle
+ */
+void lv_arc_set_angles(lv_obj_t * arc, uint16_t start, uint16_t end)
+{
+    LV_ASSERT_OBJ(arc, LV_OBJX_NAME);
+
+    lv_arc_ext_t * ext = lv_obj_get_ext_attr(arc);
+
+    if(end > 360) end -= 360;
+    if(start > 360) start -= 360;
+
+    inv_arc_area(arc, ext->arc_angle_start, ext->arc_angle_end);
+
+    ext->arc_angle_start = start;
+    ext->arc_angle_end = end;
+
+    inv_arc_area(arc, ext->arc_angle_start, ext->arc_angle_end);
 }
 
 /*=====================
@@ -297,4 +350,85 @@ static lv_style_list_t * lv_arc_get_style(lv_obj_t * arc, uint8_t part)
 
     return style_dsc_p;
 }
+
+static void inv_arc_area(lv_obj_t * arc, uint16_t start_angle, uint16_t end_angle)
+{
+    uint8_t start_quarter = start_angle / 90;
+    uint8_t end_quarter = end_angle / 90;
+    lv_coord_t x       = arc->coords.x1 + lv_obj_get_width(arc) / 2;
+    lv_coord_t y       = arc->coords.y1 + lv_obj_get_height(arc) / 2;
+    lv_coord_t rout       = (LV_MATH_MIN(lv_obj_get_width(arc), lv_obj_get_height(arc))) / 2;
+    lv_style_int_t w = lv_obj_get_style_line_width(arc, LV_ARC_PART_ARC);
+    lv_coord_t rin       = rout - w;
+
+    lv_area_t inv_area;
+
+    if(start_quarter == end_quarter && start_angle <= end_angle) {
+        if(start_quarter == 0) {
+            inv_area.y1 = y + ((lv_trigo_sin(start_angle) * rin) >> LV_TRIGO_SHIFT);
+            inv_area.x2 = x + ((lv_trigo_sin(start_angle + 90) * rout) >> LV_TRIGO_SHIFT);
+
+            inv_area.y2 = y + ((lv_trigo_sin(end_angle) * rout) >> LV_TRIGO_SHIFT);
+            inv_area.x1 = x + ((lv_trigo_sin(end_angle + 90) * rin) >> LV_TRIGO_SHIFT);
+
+            lv_obj_invalidate_area(arc, &inv_area);
+        }
+        else if(start_quarter == 1) {
+            inv_area.y2 = y + ((lv_trigo_sin(start_angle) * rout) >> LV_TRIGO_SHIFT);
+            inv_area.x2 = x + ((lv_trigo_sin(start_angle + 90) * rin) >> LV_TRIGO_SHIFT);
+
+            inv_area.y1 = y + ((lv_trigo_sin(end_angle) * rin) >> LV_TRIGO_SHIFT);
+            inv_area.x1 = x + ((lv_trigo_sin(end_angle + 90) * rout) >> LV_TRIGO_SHIFT);
+
+            lv_obj_invalidate_area(arc, &inv_area);
+        }
+        else if(start_quarter == 2) {
+            inv_area.x1 = x + ((lv_trigo_sin(start_angle + 90) * rout) >> LV_TRIGO_SHIFT);
+            inv_area.y2 = y + ((lv_trigo_sin(start_angle) * rin) >> LV_TRIGO_SHIFT);
+
+            inv_area.y1 = y + ((lv_trigo_sin(end_angle) * rout) >> LV_TRIGO_SHIFT);
+            inv_area.x2 = x + ((lv_trigo_sin(end_angle + 90) * rin) >> LV_TRIGO_SHIFT);
+
+            lv_obj_invalidate_area(arc, &inv_area);
+        }
+        else if(start_quarter == 3) {
+            /*Small arc here*/
+            inv_area.x1 = x + ((lv_trigo_sin(start_angle + 90) * rin) >> LV_TRIGO_SHIFT);
+            inv_area.y1 = y + ((lv_trigo_sin(start_angle) * rout) >> LV_TRIGO_SHIFT);
+
+            inv_area.x2 = x + ((lv_trigo_sin(end_angle + 90) * rout) >> LV_TRIGO_SHIFT);
+            inv_area.y2 = y + ((lv_trigo_sin(end_angle) * rin) >> LV_TRIGO_SHIFT);
+
+            lv_obj_invalidate_area(arc, &inv_area);
+        }
+
+    } else if(start_quarter == 0 && end_quarter == 1) {
+        inv_area.x1 = x + ((lv_trigo_sin(end_angle + 90) * rout) >> LV_TRIGO_SHIFT);
+        inv_area.y1 = y + ((LV_MATH_MIN(lv_trigo_sin(end_angle), lv_trigo_sin(start_angle))  * rin) >> LV_TRIGO_SHIFT);
+        inv_area.x2 = x + ((lv_trigo_sin(start_angle + 90) * rout) >> LV_TRIGO_SHIFT);
+        inv_area.y2 = y + rout;
+        lv_obj_invalidate_area(arc, &inv_area);
+    } else if(start_quarter == 1 && end_quarter == 2) {
+        inv_area.x1 = x - rout;
+        inv_area.y1 = y + ((lv_trigo_sin(end_angle) * rout) >> LV_TRIGO_SHIFT);
+        inv_area.x2 = x + ((LV_MATH_MAX(lv_trigo_sin(start_angle + 90) , lv_trigo_sin(end_angle + 90)) * rin) >> LV_TRIGO_SHIFT);
+        inv_area.y2 = y + ((lv_trigo_sin(start_angle) * rout) >> LV_TRIGO_SHIFT);
+        lv_obj_invalidate_area(arc, &inv_area);
+    }  else if(start_quarter == 2 && end_quarter == 3) {
+        inv_area.x1 = x + ((lv_trigo_sin(start_angle + 90) * rout) >> LV_TRIGO_SHIFT);
+        inv_area.y1 = y - rout;
+        inv_area.x2 = x + ((lv_trigo_sin(end_angle + 90) * rout) >> LV_TRIGO_SHIFT);
+        inv_area.y2 = y + (LV_MATH_MAX(lv_trigo_sin(end_angle) * rin, lv_trigo_sin(start_angle) * rin) >> LV_TRIGO_SHIFT);
+        lv_obj_invalidate_area(arc, &inv_area);
+    } else if(start_quarter == 3 && end_quarter == 0) {
+        inv_area.x1 = x + ((LV_MATH_MIN(lv_trigo_sin(end_angle + 90), lv_trigo_sin(start_angle + 90)) * rin) >> LV_TRIGO_SHIFT);
+        inv_area.y1 = y + ((lv_trigo_sin(start_angle) * rout) >> LV_TRIGO_SHIFT);
+        inv_area.x2 = x + rout;
+        inv_area.y2 = y + ((lv_trigo_sin(end_angle) * rout) >> LV_TRIGO_SHIFT);
+
+        lv_obj_invalidate_area(arc, &inv_area);
+    } else {
+        lv_obj_invalidate(arc);
+    }
+}
 #endif
diff --git a/src/lv_objx/lv_arc.h b/src/lv_objx/lv_arc.h
index 8ecef7d1c..8a61eb56e 100644
--- a/src/lv_objx/lv_arc.h
+++ b/src/lv_objx/lv_arc.h
@@ -81,6 +81,14 @@ void lv_arc_set_start_angle(lv_obj_t * arc, int16_t start);
  */
 void lv_arc_set_end_angle(lv_obj_t * arc, int16_t end);
 
+/**
+ * Set the start and end angles
+ * @param arc pointer to an arc object
+ * @param start the start angle
+ * @param end the end angle
+ */
+void lv_arc_set_angles(lv_obj_t * arc, uint16_t start, uint16_t end);
+
 /*=====================
  * Getter functions
  *====================*/
diff --git a/src/lv_objx/lv_btnm.c b/src/lv_objx/lv_btnm.c
index 560c8740e..9977c0645 100644
--- a/src/lv_objx/lv_btnm.c
+++ b/src/lv_objx/lv_btnm.c
@@ -1124,7 +1124,7 @@ static void invalidate_button_area(const lv_obj_t * btnm, uint16_t btn_idx)
     btn_area.x2 += btnm_area.x1;
     btn_area.y2 += btnm_area.y1;
 
-    lv_inv_area(lv_obj_get_disp(btnm), &btn_area);
+    lv_obj_invalidate_area(btnm, &btn_area);
 }
 
 /**
diff --git a/src/lv_objx/lv_chart.c b/src/lv_objx/lv_chart.c
index 8514a1609..05086f05c 100644
--- a/src/lv_objx/lv_chart.c
+++ b/src/lv_objx/lv_chart.c
@@ -1394,13 +1394,13 @@ static void invalidate_lines(lv_obj_t * chart, uint16_t i)
     if(i < ext->point_cnt - 1) {
         coords.x1 = ((w * i) / (ext->point_cnt - 1)) + x_ofs - line_width - point_radius;
         coords.x2 = ((w * (i + 1)) / (ext->point_cnt - 1)) + x_ofs + line_width + point_radius;
-        lv_inv_area(lv_obj_get_disp(chart), &coords);
+        lv_obj_invalidate_area(chart, &coords);
     }
 
     if(i > 0) {
         coords.x1 = ((w * (i - 1)) / (ext->point_cnt - 1)) + x_ofs - line_width - point_radius;
         coords.x2 = ((w * i) / (ext->point_cnt - 1)) + x_ofs + line_width + point_radius;
-        lv_inv_area(lv_obj_get_disp(chart), &coords);
+        lv_obj_invalidate_area(chart, &coords);
     }
 }
 
diff --git a/src/lv_objx/lv_cpicker.c b/src/lv_objx/lv_cpicker.c
index 95c6d26aa..74bfe64ff 100644
--- a/src/lv_objx/lv_cpicker.c
+++ b/src/lv_objx/lv_cpicker.c
@@ -689,7 +689,7 @@ static void invalidate_indic(lv_obj_t * cpicker)
 {
     lv_area_t indic_area = get_indic_area(cpicker);
 
-    lv_inv_area(lv_obj_get_disp(cpicker), &indic_area);
+    lv_obj_invalidate_area(cpicker, &indic_area);
 }
 
 static lv_area_t get_indic_area(lv_obj_t * cpicker)
diff --git a/src/lv_objx/lv_label.c b/src/lv_objx/lv_label.c
index 375326520..6522cb114 100644
--- a/src/lv_objx/lv_label.c
+++ b/src/lv_objx/lv_label.c
@@ -314,7 +314,6 @@ void lv_label_set_array_text(lv_obj_t * label, const char * array, uint16_t size
 void lv_label_set_static_text(lv_obj_t * label, const char * text)
 {
     LV_ASSERT_OBJ(label, LV_OBJX_NAME);
-    LV_ASSERT_STR(text);
 
     lv_label_ext_t * ext = lv_obj_get_ext_attr(label);
     if(ext->static_txt == 0 && ext->text != NULL) {
@@ -1321,10 +1320,18 @@ static void lv_label_refr_text(lv_obj_t * label)
             p.y -= line_space;                                               /*Trim the last line space*/
             uint32_t letter_id = lv_label_get_letter_on(label, &p);
 
-            /*Save letters under the dots and replace them with dots*/
-            uint32_t i;
+
+            /*Be sure there is space for the dots*/
+            size_t txt_len = strlen(ext->text);
             uint32_t byte_id     = lv_txt_encoded_get_byte_id(ext->text, letter_id);
+            while(byte_id + LV_LABEL_DOT_NUM > txt_len) {
+                byte_id -= lv_txt_encoded_size(&ext->text[byte_id]);
+                letter_id--;
+            }
+
+            /*Save letters under the dots and replace them with dots*/
             uint32_t byte_id_ori = byte_id;
+            uint32_t i;
             uint8_t len          = 0;
             for(i = 0; i <= LV_LABEL_DOT_NUM; i++) {
                 len += lv_txt_encoded_size(&ext->text[byte_id]);
diff --git a/src/lv_objx/lv_page.c b/src/lv_objx/lv_page.c
index f7dd41136..65355597d 100644
--- a/src/lv_objx/lv_page.c
+++ b/src/lv_objx/lv_page.c
@@ -766,6 +766,8 @@ static lv_res_t lv_page_signal(lv_obj_t * page, lv_signal_t sign, void * param)
     /*Automatically move children to the scrollable object*/
     else if(sign == LV_SIGNAL_CHILD_CHG) {
         lv_obj_t * child;
+        if(ext->scrl == NULL) return LV_RES_OK;
+
         lv_fit_t fit_left        = lv_page_get_scrl_fit_left(page);
         lv_fit_t fit_right        = lv_page_get_scrl_fit_right(page);
         lv_fit_t fit_top         = lv_page_get_scrl_fit_top(page);
@@ -995,7 +997,6 @@ static lv_res_t lv_page_scrollable_signal(lv_obj_t * scrl, lv_signal_t sign, voi
 
         /*Hide scrollbars if required*/
         if(page_ext->sb.mode == LV_SB_MODE_DRAG) {
-            lv_disp_t * disp = lv_obj_get_disp(page);
             lv_area_t sb_area_tmp;
             if(page_ext->sb.hor_draw) {
                 lv_area_copy(&sb_area_tmp, &page_ext->sb.hor_area);
@@ -1003,7 +1004,7 @@ static lv_res_t lv_page_scrollable_signal(lv_obj_t * scrl, lv_signal_t sign, voi
                 sb_area_tmp.y1 += page->coords.y1;
                 sb_area_tmp.x2 += page->coords.x1;
                 sb_area_tmp.y2 += page->coords.y1;
-                lv_inv_area(disp, &sb_area_tmp);
+                lv_obj_invalidate_area(page, &sb_area_tmp);
                 page_ext->sb.hor_draw = 0;
             }
             if(page_ext->sb.ver_draw) {
@@ -1012,10 +1013,12 @@ static lv_res_t lv_page_scrollable_signal(lv_obj_t * scrl, lv_signal_t sign, voi
                 sb_area_tmp.y1 += page->coords.y1;
                 sb_area_tmp.x2 += page->coords.x1;
                 sb_area_tmp.y2 += page->coords.y1;
-                lv_inv_area(disp, &sb_area_tmp);
+                lv_obj_invalidate_area(page, &sb_area_tmp);
                 page_ext->sb.ver_draw = 0;
             }
         }
+    } else if(sign == LV_SIGNAL_CLEANUP) {
+        page_ext->scrl = NULL;
     }
     return res;
 }
@@ -1115,7 +1118,6 @@ static void lv_page_sb_refresh(lv_obj_t * page)
     }
 
     /*Invalidate the current (old) scrollbar areas*/
-    lv_disp_t * disp = lv_obj_get_disp(page);
     lv_area_t sb_area_tmp;
     if(ext->sb.hor_draw != 0) {
         lv_area_copy(&sb_area_tmp, &ext->sb.hor_area);
@@ -1123,7 +1125,7 @@ static void lv_page_sb_refresh(lv_obj_t * page)
         sb_area_tmp.y1 += page->coords.y1;
         sb_area_tmp.x2 += page->coords.x1;
         sb_area_tmp.y2 += page->coords.y1;
-        lv_inv_area(disp, &sb_area_tmp);
+        lv_obj_invalidate_area(page, &sb_area_tmp);
     }
     if(ext->sb.ver_draw != 0) {
         lv_area_copy(&sb_area_tmp, &ext->sb.ver_area);
@@ -1131,7 +1133,7 @@ static void lv_page_sb_refresh(lv_obj_t * page)
         sb_area_tmp.y1 += page->coords.y1;
         sb_area_tmp.x2 += page->coords.x1;
         sb_area_tmp.y2 += page->coords.y1;
-        lv_inv_area(disp, &sb_area_tmp);
+        lv_obj_invalidate_area(page, &sb_area_tmp);
     }
 
     if(ext->sb.mode == LV_SB_MODE_DRAG && lv_indev_is_dragging(lv_indev_get_act()) == false) {
@@ -1193,7 +1195,7 @@ static void lv_page_sb_refresh(lv_obj_t * page)
         sb_area_tmp.y1 += page->coords.y1;
         sb_area_tmp.x2 += page->coords.x1;
         sb_area_tmp.y2 += page->coords.y1;
-        lv_inv_area(disp, &sb_area_tmp);
+        lv_obj_invalidate_area(page, &sb_area_tmp);
     }
     if(ext->sb.ver_draw != 0) {
         lv_area_copy(&sb_area_tmp, &ext->sb.ver_area);
@@ -1201,7 +1203,7 @@ static void lv_page_sb_refresh(lv_obj_t * page)
         sb_area_tmp.y1 += page->coords.y1;
         sb_area_tmp.x2 += page->coords.x1;
         sb_area_tmp.y2 += page->coords.y1;
-        lv_inv_area(disp, &sb_area_tmp);
+        lv_obj_invalidate_area(page, &sb_area_tmp);
     }
 }
 
diff --git a/src/lv_objx/lv_preload.c b/src/lv_objx/lv_preload.c
index 642a26f8e..ee37ce26f 100644
--- a/src/lv_objx/lv_preload.c
+++ b/src/lv_objx/lv_preload.c
@@ -87,7 +87,7 @@ lv_obj_t * lv_preload_create(lv_obj_t * par, const lv_obj_t * copy)
     ext->arc_length = LV_PRELOAD_DEF_ARC_LENGTH;
     ext->anim_type  = LV_PRELOAD_DEF_ANIM;
     ext->anim_dir   = LV_PRELOAD_DIR_FORWARD;
-    ext->time = LV_PRELOAD_DEF_SPIN_TIME*5;
+    ext->time = LV_PRELOAD_DEF_SPIN_TIME;
 
     /*The signal and design functions are not copied so set them here*/
     lv_obj_set_signal_cb(preload, lv_preload_signal);
@@ -321,8 +321,7 @@ void lv_preload_spinner_anim(void * ptr, lv_anim_value_t val)
     angle_start = angle_start % 360;
     angle_end   = angle_end % 360;
 
-    lv_arc_set_start_angle(preload, angle_start);
-    lv_arc_set_end_angle(preload, angle_end);
+    lv_arc_set_angles(preload, angle_start, angle_end);
 }
 
 /**********************
diff --git a/src/lv_objx/lv_ta.c b/src/lv_objx/lv_ta.c
index 249fe91f0..09edec4d8 100644
--- a/src/lv_objx/lv_ta.c
+++ b/src/lv_objx/lv_ta.c
@@ -914,6 +914,7 @@ void lv_ta_set_cursor_blink_time(lv_obj_t * ta, uint16_t time)
         a.path_cb        = lv_anim_path_step;
         lv_anim_create(&a);
     } else {
+        lv_anim_del(ta, (lv_anim_exec_xcb_t)cursor_blink_anim);
         ext->cursor.state = 1;
     }
 #else
@@ -1581,14 +1582,13 @@ static void cursor_blink_anim(lv_obj_t * ta, lv_anim_value_t show)
     if(show != ext->cursor.state) {
         ext->cursor.state = show == 0 ? 0 : 1;
         if(ext->cursor.hidden == 0) {
-            lv_disp_t * disp = lv_obj_get_disp(ta);
             lv_area_t area_tmp;
             lv_area_copy(&area_tmp, &ext->cursor.area);
             area_tmp.x1 += ext->label->coords.x1;
             area_tmp.y1 += ext->label->coords.y1;
             area_tmp.x2 += ext->label->coords.x1;
             area_tmp.y2 += ext->label->coords.y1;
-            lv_inv_area(disp, &area_tmp);
+            lv_obj_invalidate_area(ta, &area_tmp);
         }
     }
 }
@@ -1737,14 +1737,13 @@ static void refr_cursor_area(lv_obj_t * ta)
     cur_area.y2 = letter_pos.y + bottom + letter_h;
 
     /*Save the new area*/
-    lv_disp_t * disp = lv_obj_get_disp(ta);
     lv_area_t area_tmp;
     lv_area_copy(&area_tmp, &ext->cursor.area);
     area_tmp.x1 += ext->label->coords.x1;
     area_tmp.y1 += ext->label->coords.y1;
     area_tmp.x2 += ext->label->coords.x1;
     area_tmp.y2 += ext->label->coords.y1;
-    lv_inv_area(disp, &area_tmp);
+    lv_obj_invalidate_area(ta, &area_tmp);
 
     lv_area_copy(&ext->cursor.area, &cur_area);
 
@@ -1753,7 +1752,7 @@ static void refr_cursor_area(lv_obj_t * ta)
     area_tmp.y1 += ext->label->coords.y1;
     area_tmp.x2 += ext->label->coords.x1;
     area_tmp.y2 += ext->label->coords.y1;
-    lv_inv_area(disp, &area_tmp);
+    lv_obj_invalidate_area(ta, &area_tmp);
 }
 
 static void placeholder_update(lv_obj_t * ta)
diff --git a/src/lv_objx/lv_tabview.c b/src/lv_objx/lv_tabview.c
index 71db7589e..6f2fd31c8 100644
--- a/src/lv_objx/lv_tabview.c
+++ b/src/lv_objx/lv_tabview.c
@@ -113,8 +113,17 @@ lv_obj_t * lv_tabview_create(lv_obj_t * par, const lv_obj_t * copy)
         /* Set a size which fits into the parent.
          * Don't use `par` directly because if the tabview is created on a page it is moved to the
          * scrollable so the parent has changed */
-        lv_obj_set_size(tabview, lv_obj_get_width_fit(lv_obj_get_parent(tabview)),
-                lv_obj_get_height_fit(lv_obj_get_parent(tabview)));
+        lv_coord_t w;
+        lv_coord_t h;
+        if(par) {
+            w = lv_obj_get_width_fit(lv_obj_get_parent(tabview));
+            h = lv_obj_get_height_fit(lv_obj_get_parent(tabview));
+        } else {
+            w = lv_disp_get_hor_res(NULL);
+            h = lv_disp_get_ver_res(NULL);
+        }
+
+        lv_obj_set_size(tabview, w, h);
 
         ext->content = lv_page_create(tabview, NULL);
         ext->btns    = lv_btnm_create(tabview, NULL);
diff --git a/src/lv_objx/lv_tileview.c b/src/lv_objx/lv_tileview.c
index 5155f0dbf..cdb1b3694 100644
--- a/src/lv_objx/lv_tileview.c
+++ b/src/lv_objx/lv_tileview.c
@@ -101,10 +101,20 @@ lv_obj_t * lv_tileview_create(lv_obj_t * par, const lv_obj_t * copy)
         /* Set a size which fits into the parent.
          * Don't use `par` directly because if the tileview is created on a page it is moved to the
          * scrollable so the parent has changed */
-        lv_obj_set_size(new_tileview, lv_obj_get_width_fit(lv_obj_get_parent(new_tileview)),
-        lv_obj_get_height_fit(lv_obj_get_parent(new_tileview)));
-        lv_obj_set_drag_dir(lv_page_get_scrl(new_tileview), LV_DRAG_DIR_ONE);
-        lv_obj_set_drag_throw(lv_page_get_scrl(new_tileview), true);
+        lv_coord_t w;
+        lv_coord_t h;
+        if(par) {
+            w = lv_obj_get_width_fit(lv_obj_get_parent(new_tileview));
+            h = lv_obj_get_height_fit(lv_obj_get_parent(new_tileview));
+        } else {
+            w = lv_disp_get_hor_res(NULL);
+            h = lv_disp_get_ver_res(NULL);
+        }
+
+        lv_obj_set_size(new_tileview, w, h);
+
+        lv_obj_set_drag_throw(lv_page_get_scrl(new_tileview), false);
+
         lv_page_set_scrl_fit(new_tileview, LV_FIT_TIGHT);
 
         lv_obj_reset_style(new_tileview, LV_PAGE_PART_SCRL);
diff --git a/src/lv_objx/lv_win.c b/src/lv_objx/lv_win.c
index e0be314f6..4ab883796 100644
--- a/src/lv_objx/lv_win.c
+++ b/src/lv_objx/lv_win.c
@@ -78,10 +78,18 @@ lv_obj_t * lv_win_create(lv_obj_t * par, const lv_obj_t * copy)
         /* Set a size which fits into the parent.
          * Don't use `par` directly because if the window is created on a page it is moved to the
          * scrollable so the parent has changed */
-        lv_obj_set_size(new_win, lv_obj_get_width_fit(lv_obj_get_parent(new_win)),
-                        lv_obj_get_height_fit(lv_obj_get_parent(new_win)));
+        lv_coord_t w;
+        lv_coord_t h;
+        if(par) {
+            w = lv_obj_get_width_fit(lv_obj_get_parent(new_win));
+            h = lv_obj_get_height_fit(lv_obj_get_parent(new_win));
+        } else {
+            w = lv_disp_get_hor_res(NULL);
+            h = lv_disp_get_ver_res(NULL);
+        }
+
+        lv_obj_set_size(new_win, w, h);
 
-        lv_obj_set_pos(new_win, 0, 0);
         lv_obj_set_style(new_win, &lv_style_pretty);
 
         ext->page = lv_page_create(new_win, NULL);