diff --git a/lv_core/lv_style.h b/lv_core/lv_style.h
index 49c8e9175..ff514b936 100644
--- a/lv_core/lv_style.h
+++ b/lv_core/lv_style.h
@@ -48,11 +48,14 @@ typedef enum
 
 typedef struct
 {
-    uint8_t glass :1;   /*1: Do not inherit this style*/
+    uint8_t glass :1;   		/*1: Do not inherit this style*/
 
     struct {
         lv_color_t main_color;
-        lv_color_t grad_color;
+        union {
+        	lv_color_t grad_color;		/*`grad_color` will be removed in v6.0, use `aux_color` instead*/
+        	lv_color_t aux_color;
+        };
         lv_coord_t radius;
         lv_coord_t thickness;		/*Depending on the object type thickness of something*/
         lv_opa_t opa;
diff --git a/lv_draw/lv_draw_arc.c b/lv_draw/lv_draw_arc.c
index fc762cfbf..a7454ba05 100644
--- a/lv_draw/lv_draw_arc.c
+++ b/lv_draw/lv_draw_arc.c
@@ -23,6 +23,8 @@
 static uint16_t fast_atan2(int x, int y);
 static void ver_line(lv_coord_t x, lv_coord_t y, const lv_area_t * mask, lv_coord_t len, lv_color_t color, lv_opa_t opa);
 static void hor_line(lv_coord_t x, lv_coord_t y, const lv_area_t * mask, lv_coord_t len, lv_color_t color, lv_opa_t opa);
+static bool deg_test_norm(uint16_t deg, uint16_t start, uint16_t end);
+static bool deg_test_inv(uint16_t deg, uint16_t start, uint16_t end);
 
 /**********************
  *  STATIC VARIABLES
@@ -62,12 +64,17 @@ void lv_draw_arc(lv_coord_t center_x, lv_coord_t center_y, uint16_t radius, cons
     lv_color_t color = style->body.main_color;
     lv_opa_t opa = style->body.opa;
 
+
+    bool (*deg_test)(uint16_t, uint16_t, uint16_t);
+    if(start_angle <= end_angle) deg_test = deg_test_norm;
+    else deg_test = deg_test_inv;
+
     // Good, may not be the fastest
     // Does not draw overlapping pixels
-    if ((270 >= start_angle) && (270 <= end_angle)) 	hor_line(center_x - r_out + 1, center_y, mask, thickness - 1, color, opa);	// Left Middle
-    if ((90 >= start_angle) && (90 <= end_angle)) 	hor_line(center_x + r_in, center_y,  mask, thickness - 1, color, opa);		// Right Middle
-    if ((180 >= start_angle) && (180 <= end_angle)) 	ver_line(center_x, center_y - r_out + 1,  mask, thickness - 1, color, opa);	// Top Middle
-    if ((0 >= start_angle) && (0 <= end_angle)) 		ver_line(center_x, center_y + r_in,  mask, thickness - 1, color, opa);		// Bottom middle
+    if (deg_test(270, start_angle, end_angle)) 	hor_line(center_x - r_out + 1, center_y, mask, thickness - 1, color, opa);	// Left Middle
+    if (deg_test(90, start_angle, end_angle)) 	hor_line(center_x + r_in, center_y,  mask, thickness - 1, color, opa);		// Right Middle
+    if (deg_test(180, start_angle, end_angle)) 	ver_line(center_x, center_y - r_out + 1,  mask, thickness - 1, color, opa);	// Top Middle
+    if (deg_test(0, start_angle, end_angle)) 	ver_line(center_x, center_y + r_in,  mask, thickness - 1, color, opa);		// Bottom middle
 
     uint32_t r_out_sqr = r_out * r_out;
     uint32_t r_in_sqr = r_in * r_in;
@@ -90,25 +97,32 @@ void lv_draw_arc(lv_coord_t center_x, lv_coord_t center_y, uint16_t radius, cons
             deg_base =  fast_atan2(xi, yi) - 180;
 
 			deg = 180 + deg_base;
-			if ((deg >= start_angle) && (deg <= end_angle)) {
+			if (deg_test(deg, start_angle, end_angle)) {
 				if(x_start[0] == LV_COORD_MIN) x_start[0] = xi;
-			} else if(x_start[0] != LV_COORD_MIN && x_end[0] == LV_COORD_MIN) x_end[0] = xi - 1;
+			} else if(x_start[0] != LV_COORD_MIN && x_end[0] == LV_COORD_MIN) {
+				x_end[0] = xi - 1;
+			}
 
-
-			deg = 360 - deg_base; //BSP_LCD_FastAtan2(x, -y);
-			if ((deg >= start_angle) && (deg <= end_angle)) {
+			deg = 360 - deg_base;
+			if (deg_test(deg, start_angle, end_angle)) {
 				if(x_start[1] == LV_COORD_MIN) x_start[1] = xi;
-			} else if(x_start[1] != LV_COORD_MIN && x_end[1] == LV_COORD_MIN) x_end[1] = xi - 1;
+			} else if(x_start[1] != LV_COORD_MIN && x_end[1] == LV_COORD_MIN) {
+				x_end[1] = xi - 1;
+			}
 
-			deg = 180 - deg_base; //BSP_LCD_FastAtan2(-x, y);
-			if ((deg >= start_angle) && (deg <= end_angle)) {
+			deg = 180 - deg_base;
+			if (deg_test(deg, start_angle, end_angle)) {
 				if(x_start[2] == LV_COORD_MIN) x_start[2] = xi;
-			} else if(x_start[2] != LV_COORD_MIN && x_end[2] == LV_COORD_MIN) x_end[2] = xi - 1;
+			} else if(x_start[2] != LV_COORD_MIN && x_end[2] == LV_COORD_MIN) {
+				x_end[2] = xi - 1;
+			}
 
-			deg = deg_base; //BSP_LCD_FastAtan2(-x, -y);
-			if ((deg >= start_angle) && (deg <= end_angle)) {
+			deg = deg_base;
+			if (deg_test(deg, start_angle, end_angle)) {
 				if(x_start[3] == LV_COORD_MIN) x_start[3] = xi;
-			} else if(x_start[3] != LV_COORD_MIN && x_end[3] == LV_COORD_MIN) x_end[3] = xi - 1;
+			} else if(x_start[3] != LV_COORD_MIN && x_end[3] == LV_COORD_MIN) {
+				x_end[3] = xi - 1;
+			}
 
             if(r_act_sqr < r_in_sqr) break;	/*No need to continue the iteration in x once we found the inner edge of the arc*/
         }
@@ -241,3 +255,17 @@ static void hor_line(lv_coord_t x, lv_coord_t y, const lv_area_t * mask, lv_coor
 
 	fill_fp(&area, mask, color, opa);
 }
+
+static bool deg_test_norm(uint16_t deg, uint16_t start, uint16_t end)
+{
+	if(deg >= start && deg <= end) return true;
+	else return false;
+}
+
+static bool deg_test_inv(uint16_t deg, uint16_t start, uint16_t end)
+{
+	if(deg >= start || deg <= end) {
+		return true;
+	}
+	else return false;
+}
diff --git a/lv_misc/lv_anim.c b/lv_misc/lv_anim.c
index 53f81b4f2..323693f80 100644
--- a/lv_misc/lv_anim.c
+++ b/lv_misc/lv_anim.c
@@ -14,11 +14,12 @@
 #include "../lv_hal/lv_hal_tick.h"
 #include "lv_task.h"
 #include "lv_math.h"
+#include "lv_trigo.h"
 
 /*********************
  *      DEFINES
  *********************/
-#define LV_ANIM_RESOLUTION             1024
+#define LV_ANIM_RESOLUTION      1024
 #define LV_ANIM_RES_SHIFT       10
 
 /**********************
@@ -136,12 +137,11 @@ int32_t lv_anim_path_linear(const lv_anim_t *a)
     /*Calculate the current step*/
 
     uint16_t step;
-    if(a->time == a->act_time) step = LV_ANIM_RESOLUTION; /*Use the last value id the time fully elapsed*/
+    if(a->time == a->act_time) step = LV_ANIM_RESOLUTION; /*Use the last value if the time fully elapsed*/
     else step = (a->act_time * LV_ANIM_RESOLUTION) / a->time;
 
-
-    /* Get the new value which will be proportional to the current element of 'path_p'
-     * and the 'start' and 'end' values*/
+    /* Get the new value which will be proportional to `step`
+     * and the `start` and `end` values*/
     int32_t new_value;
     new_value =  (int32_t) step * (a->end - a->start);
     new_value = new_value >> LV_ANIM_RES_SHIFT;
@@ -150,6 +150,35 @@ int32_t lv_anim_path_linear(const lv_anim_t *a)
     return new_value;
 }
 
+/**
+ * Calculate the current value of an animation applying an "S" characteristic (cosine)
+ * @param a pointer to an animation
+ * @return the current value to set
+ */
+int32_t lv_anim_path_momentum(const lv_anim_t *a)
+{
+    /*Calculate the current step*/
+
+    int16_t angle;
+    if(a->time == a->act_time) angle = 180;
+    else angle = (int32_t)((int32_t)a->act_time * 180) / a->time;
+
+    int32_t step = lv_trigo_sin(angle - 90) + LV_TRIGO_SIN_MAX;
+
+
+    /* Get the new value which will be proportional to `step`
+     * and the `start` and `end` values*/
+    int32_t new_value;
+    new_value =  (int32_t) step * (a->end - a->start);
+    new_value = new_value >> 16;
+    new_value += a->start;
+
+
+//    printf("angle: %d, val: %d\n", angle, new_value);
+
+    return new_value;
+}
+
 /**
  * Calculate the current value of an animation applying step characteristic.
  * (Set end value on the end of the animation)
diff --git a/lv_misc/lv_anim.h b/lv_misc/lv_anim.h
index e69f98ec3..e35a129ee 100644
--- a/lv_misc/lv_anim.h
+++ b/lv_misc/lv_anim.h
@@ -108,6 +108,14 @@ uint16_t lv_anim_speed_to_time(uint16_t speed, int32_t start, int32_t end);
  */
 int32_t lv_anim_path_linear(const lv_anim_t *a);
 
+
+/**
+ * Calculate the current value of an animation applying an "S" characteristic (cosine)
+ * @param a pointer to an animation
+ * @return the current value to set
+ */
+int32_t lv_anim_path_momentum(const lv_anim_t *a);
+
 /**
  * Calculate the current value of an animation applying step characteristic.
  * (Set end value on the end of the animation)
diff --git a/lv_misc/lv_txt.c b/lv_misc/lv_txt.c
index 6e094a1a7..9361d9e15 100644
--- a/lv_misc/lv_txt.c
+++ b/lv_misc/lv_txt.c
@@ -203,7 +203,7 @@ lv_coord_t lv_txt_get_width(const char * txt, uint16_t length,
 
         /*Trim closing spaces. Important when the text is aligned to the middle */
         for(i = length - 1; i > 0; i--) {
-            if(txt[i] == ' ') {
+            if(txt[i] == ' ' || txt[i] == '\n' || txt[i] == '\r') {
                 width -= lv_font_get_width(font, txt[i]);
                 width -= letter_space;
             } else {
diff --git a/lv_objx/lv_arc.c b/lv_objx/lv_arc.c
index 586224ce3..1ca8fb47e 100644
--- a/lv_objx/lv_arc.c
+++ b/lv_objx/lv_arc.c
@@ -76,7 +76,7 @@ lv_obj_t * lv_arc_create(lv_obj_t * par, lv_obj_t * copy)
 
     /*Init the new arc arc*/
     if(copy == NULL) {
-    	lv_arc_set_style(new_arc, &lv_style_plain_color);
+    	lv_arc_set_style(new_arc, LV_ARC_STYLE_MAIN, &lv_style_plain_color);
     }
     /*Copy an existing arc*/
     else {
@@ -117,8 +117,8 @@ void lv_arc_set_angles(lv_obj_t * arc, uint16_t start, uint16_t end)
 	if(start > 360) start = 360;
 	if(end > 360) end = 360;
 
-	ext->angle_start = LV_MATH_MIN(start, end);
-	ext->angle_end = LV_MATH_MAX(start, end);
+	ext->angle_start = start;
+	ext->angle_end = end;
 
 	lv_obj_invalidate(arc);
 }
@@ -147,7 +147,7 @@ void lv_arc_set_style(lv_obj_t * arc, lv_arc_style_t type, lv_style_t *style)
  * @param arc pointer to an arc object
  * @return the start angle [0..360]
  */
-uint16_t lv_arc_get_angle_start(lv_obj_t * arc, uint16_t start, uint16_t end)
+uint16_t lv_arc_get_angle_start(lv_obj_t * arc)
 {
 	lv_arc_ext_t * ext = lv_obj_get_ext_attr(arc);
 
@@ -159,7 +159,7 @@ uint16_t lv_arc_get_angle_start(lv_obj_t * arc, uint16_t start, uint16_t end)
  * @param arc pointer to an arc object
  * @return the end angle [0..360]
  */
-uint16_t lv_arc_get_angle_end(lv_obj_t * arc, uint16_t start, uint16_t end)
+uint16_t lv_arc_get_angle_end(lv_obj_t * arc)
 {
 	lv_arc_ext_t * ext = lv_obj_get_ext_attr(arc);
 
diff --git a/lv_objx/lv_arc.h b/lv_objx/lv_arc.h
index f6e6df6ea..959c41257 100644
--- a/lv_objx/lv_arc.h
+++ b/lv_objx/lv_arc.h
@@ -86,14 +86,14 @@ void lv_arc_set_style(lv_obj_t * arc, lv_arc_style_t type, lv_style_t *style);
  * @param arc pointer to an arc object
  * @return the start angle [0..360]
  */
-uint16_t lv_arc_get_angle_start(lv_obj_t * arc, uint16_t start, uint16_t end);
+uint16_t lv_arc_get_angle_start(lv_obj_t * arc);
 
 /**
  * Get the end angles of an arc.
  * @param arc pointer to an arc object
  * @return the end angle [0..360]
  */
-uint16_t lv_arc_get_angle_end(lv_obj_t * arc, uint16_t start, uint16_t end);
+uint16_t lv_arc_get_angle_end(lv_obj_t * arc);
 
 /**
  * Get style of a arc.
diff --git a/lvgl.h b/lvgl.h
index 7bfb55afc..b168a8d50 100644
--- a/lvgl.h
+++ b/lvgl.h
@@ -27,6 +27,7 @@ extern "C" {
 
 #include "lv_objx/lv_btn.h"
 #include "lv_objx/lv_img.h"
+#include "lv_objx/lv_img.h"
 #include "lv_objx/lv_label.h"
 #include "lv_objx/lv_line.h"
 #include "lv_objx/lv_page.h"
@@ -49,6 +50,8 @@ extern "C" {
 #include "lv_objx/lv_lmeter.h"
 #include "lv_objx/lv_sw.h"
 #include "lv_objx/lv_kb.h"
+#include "lv_objx/lv_arc.h"
+#include "lv_objx/lv_preload.h"
 #include "lv_objx/lv_calendar.h"
 
 /*********************