diff --git a/src/lv_objx/lv_preload.c b/src/lv_objx/lv_preload.c
index 31664299e..7bff32e65 100644
--- a/src/lv_objx/lv_preload.c
+++ b/src/lv_objx/lv_preload.c
@@ -80,7 +80,7 @@ lv_obj_t * lv_preload_create(lv_obj_t * par, const lv_obj_t * copy)
     /*Initialize the allocated 'ext' */
     ext->arc_length = LV_PRELOAD_DEF_ARC_LENGTH;
     ext->anim_type  = LV_PRELOAD_DEF_ANIM;
-    ext->anim_direction = LV_PRELOAD_DIRECTION_FORWARD;
+    ext->anim_dir = LV_PRELOAD_DIR_FORWARD;
 
     /*The signal and design functions are not copied so set them here*/
     lv_obj_set_signal_cb(new_preload, lv_preload_signal);
@@ -106,12 +106,12 @@ lv_obj_t * lv_preload_create(lv_obj_t * par, const lv_obj_t * copy)
         lv_preload_ext_t * copy_ext = lv_obj_get_ext_attr(copy);
         ext->arc_length             = copy_ext->arc_length;
         ext->time                   = copy_ext->time;
-        ext->anim_direction         = copy_ext->anim_direction;
+        ext->anim_dir               = copy_ext->anim_dir;
         /*Refresh the style with new signal function*/
         lv_obj_refresh_style(new_preload);
     }
 
-    lv_preload_set_animation_type(new_preload, ext->anim_type);
+    lv_preload_set_anim_type(new_preload, ext->anim_type);
 
     LV_LOG_INFO("preload created");
 
@@ -144,7 +144,7 @@ void lv_preload_set_spin_time(lv_obj_t * preload, uint16_t time)
     lv_preload_ext_t * ext = lv_obj_get_ext_attr(preload);
 
     ext->time = time;
-    lv_preload_set_animation_type(preload, ext->anim_type);
+    lv_preload_set_anim_type(preload, ext->anim_type);
 }
 /*=====================
  * Setter functions
@@ -168,7 +168,7 @@ void lv_preload_set_style(lv_obj_t * preload, lv_preload_style_t type, const lv_
  * @param preload pointer to pre loader object
  * @param type animation type of the preload
  *  */
-void lv_preload_set_animation_type(lv_obj_t * preload, lv_preload_type_t type)
+void lv_preload_set_anim_type(lv_obj_t * preload, lv_preload_type_t type)
 {
 #if LV_USE_ANIMATION
     lv_preload_ext_t * ext = lv_obj_get_ext_attr(preload);
@@ -180,7 +180,7 @@ void lv_preload_set_animation_type(lv_obj_t * preload, lv_preload_type_t type)
             ext->anim_type = LV_PRELOAD_TYPE_FILLSPIN_ARC;
             lv_anim_t a;
             a.var            = preload;
-            if( ext->anim_direction == LV_PRELOAD_DIRECTION_FORWARD ) {
+            if( ext->anim_dir == LV_PRELOAD_DIR_FORWARD ) {
                 /* Clockwise */
                 a.start      = 360;
                 a.end        = 0;
@@ -189,7 +189,7 @@ void lv_preload_set_animation_type(lv_obj_t * preload, lv_preload_type_t type)
                 a.start      = 0;
                 a.end        = 360;
             }
-            a.fp             = (lv_anim_fp_t)lv_preload_spinner_animation;
+            a.fp             = (lv_anim_fp_t)lv_preload_spinner_anim;
             a.path           = lv_anim_path_ease_in_out;
             a.end_cb         = NULL;
             a.act_time       = 0;
@@ -202,7 +202,7 @@ void lv_preload_set_animation_type(lv_obj_t * preload, lv_preload_type_t type)
 
             lv_anim_t b;
             b.var            = preload;
-            if( ext->anim_direction == LV_PRELOAD_DIRECTION_FORWARD ) {
+            if( ext->anim_dir == LV_PRELOAD_DIR_FORWARD ) {
                 /* Clockwise */
                 b.start      = 360 - ext->arc_length;
                 b.end        = ext->arc_length;
@@ -228,7 +228,7 @@ void lv_preload_set_animation_type(lv_obj_t * preload, lv_preload_type_t type)
             ext->anim_type = LV_PRELOAD_TYPE_SPINNING_ARC;
             lv_anim_t a;
             a.var            = preload;
-            if( ext->anim_direction == LV_PRELOAD_DIRECTION_FORWARD ) {
+            if( ext->anim_dir == LV_PRELOAD_DIR_FORWARD ) {
                 /* Clockwise */
                 a.start      = 360;
                 a.end        = 0;
@@ -237,7 +237,7 @@ void lv_preload_set_animation_type(lv_obj_t * preload, lv_preload_type_t type)
                 a.start      = 0;
                 a.end        = 360;
             }
-            a.fp             = (lv_anim_fp_t)lv_preload_spinner_animation;
+            a.fp             = (lv_anim_fp_t)lv_preload_spinner_anim;
             a.path           = lv_anim_path_ease_in_out;
             a.end_cb         = NULL;
             a.act_time       = 0;
@@ -254,11 +254,11 @@ void lv_preload_set_animation_type(lv_obj_t * preload, lv_preload_type_t type)
 #endif // LV_USE_ANIMATION
 }
 
-void lv_preload_set_animation_direction(lv_obj_t * preload, lv_preload_direction_t direction) {
+void lv_preload_set_anim_dir(lv_obj_t * preload, lv_preload_dir_t dir) {
     lv_preload_ext_t * ext = lv_obj_get_ext_attr(preload);
 
-    ext->anim_direction = direction;
-    lv_preload_set_animation_type(preload, ext->anim_type);
+    ext->anim_dir = dir;
+    lv_preload_set_anim_type(preload, ext->anim_type);
 }
 
 /*=====================
@@ -308,15 +308,15 @@ const lv_style_t * lv_preload_get_style(const lv_obj_t * preload, lv_preload_sty
  * @param preload pointer to pre loader object
  * @return animation type
  *  */
-lv_preload_type_t lv_preload_get_animation_type(lv_obj_t * preload)
+lv_preload_type_t lv_preload_get_anim_type(lv_obj_t * preload)
 {
     lv_preload_ext_t * ext = lv_obj_get_ext_attr(preload);
     return ext->anim_type;
 }
 
-lv_preload_direction_t lv_preload_get_animation_direction(lv_obj_t * preload) {
+lv_preload_dir_t lv_preload_get_anim_dir(lv_obj_t * preload) {
     lv_preload_ext_t * ext = lv_obj_get_ext_attr(preload);
-    return ext->anim_direction;
+    return ext->anim_dir;
 }
 
 /*=====================
@@ -328,7 +328,7 @@ lv_preload_direction_t lv_preload_get_animation_direction(lv_obj_t * preload) {
  * @param ptr pointer to preloader
  * @param val the current desired value [0..360]
  */
-void lv_preload_spinner_animation(void * ptr, int32_t val)
+void lv_preload_spinner_anim(void * ptr, int32_t val)
 {
     lv_obj_t * preload     = ptr;
     lv_preload_ext_t * ext = lv_obj_get_ext_attr(preload);
diff --git a/src/lv_objx/lv_preload.h b/src/lv_objx/lv_preload.h
index d6fc4d3ea..3590f3d1c 100644
--- a/src/lv_objx/lv_preload.h
+++ b/src/lv_objx/lv_preload.h
@@ -48,10 +48,10 @@ enum {
 typedef uint8_t lv_preload_type_t;
 
 enum {
-    LV_PRELOAD_DIRECTION_FORWARD,
-    LV_PRELOAD_DIRECTION_BACKWARD,
+    LV_PRELOAD_DIR_FORWARD,
+    LV_PRELOAD_DIR_BACKWARD,
 };
-typedef uint8_t lv_preload_direction_t;
+typedef uint8_t lv_preload_dir_t;
 
 /*Data of pre loader*/
 typedef struct
@@ -61,7 +61,7 @@ typedef struct
     uint16_t arc_length;         /*Length of the spinning indicator in degree*/
     uint16_t time;               /*Time of one round*/
     lv_preload_type_t anim_type:1; /*Type of the arc animation*/
-    lv_preload_direction_t anim_direction:1; /*Animation Direction*/
+    lv_preload_dir_t anim_dir:1;   /*Animation Direction*/
 } lv_preload_ext_t;
 
 /*Styles*/
@@ -118,14 +118,14 @@ void lv_preload_set_style(lv_obj_t * preload, lv_preload_style_t type, const lv_
  * @param preload pointer to pre loader object
  * @param type animation type of the preload
  *  */
-void lv_preload_set_animation_type(lv_obj_t * preload, lv_preload_type_t type);
+void lv_preload_set_anim_type(lv_obj_t * preload, lv_preload_type_t type);
 
 /**
  * Set the animation direction of a preloader
  * @param preload pointer to pre loader object
  * @param direction animation direction of the preload
  */
-void lv_preload_set_animation_direction(lv_obj_t * preload, lv_preload_direction_t direction);
+void lv_preload_set_anim_dir(lv_obj_t * preload, lv_preload_dir_t dir);
 
 /*=====================
  * Getter functions
@@ -156,14 +156,14 @@ const lv_style_t * lv_preload_get_style(const lv_obj_t * preload, lv_preload_sty
  * @param preload pointer to pre loader object
  * @return animation type
  *  */
-lv_preload_type_t lv_preload_get_animation_type(lv_obj_t * preload);
+lv_preload_type_t lv_preload_get_anim_type(lv_obj_t * preload);
 
 /**
  * Get the animation direction of a preloader
  * @param preload pointer to pre loader object
  * @return animation direction
  */
-lv_preload_direction_t lv_preload_get_animation_direction(lv_obj_t * preload);
+lv_preload_dir_t lv_preload_get_anim_dir(lv_obj_t * preload);
 
 /*=====================
  * Other functions
@@ -175,7 +175,7 @@ lv_preload_direction_t lv_preload_get_animation_direction(lv_obj_t * preload);
  * @param type which style should be get
  * @return style pointer to the style
  *  */
-void lv_preload_spinner_animation(void * ptr, int32_t val);
+void lv_preload_spinner_anim(void * ptr, int32_t val);
 
 /**********************
  *      MACROS