diff --git a/src/lv_api_map.h b/src/lv_api_map.h
index 1f27c3a8e..12a77a906 100644
--- a/src/lv_api_map.h
+++ b/src/lv_api_map.h
@@ -66,7 +66,7 @@ static inline bool lv_dropdown_get_draw_arrow(lv_obj_t * ddlist)
 static inline void lv_bar_set_sym(lv_obj_t * bar, bool en)
 {
     if(en)
-        lv_bar_set_type(bar, LV_BAR_TYPE_SYM);
+        lv_bar_set_type(bar, LV_BAR_TYPE_SYMMETRICAL);
     else
         lv_bar_set_type(bar, LV_BAR_TYPE_NORMAL);
 }
@@ -79,7 +79,7 @@ static inline void lv_bar_set_sym(lv_obj_t * bar, bool en)
  */
 static inline bool lv_bar_get_sym(lv_obj_t * bar)
 {
-    return lv_bar_get_type(bar) == LV_BAR_TYPE_SYM;
+    return lv_bar_get_type(bar) == LV_BAR_TYPE_SYMMETRICAL;
 }
 
 #endif
diff --git a/src/lv_themes/lv_theme_material.c b/src/lv_themes/lv_theme_material.c
index 086093a67..937e05409 100644
--- a/src/lv_themes/lv_theme_material.c
+++ b/src/lv_themes/lv_theme_material.c
@@ -1016,8 +1016,8 @@ void lv_theme_material_apply(lv_obj_t * obj, lv_theme_style_t name)
             list = lv_obj_get_style_list(obj, LV_ARC_PART_BG);
             lv_style_list_add_style(list, &arc_bg);
 
-            lv_obj_clean_style_list(obj, LV_ARC_PART_ARC);
-            list = lv_obj_get_style_list(obj, LV_ARC_PART_ARC);
+            lv_obj_clean_style_list(obj, LV_ARC_PART_INDIC);
+            list = lv_obj_get_style_list(obj, LV_ARC_PART_INDIC);
             lv_style_list_add_style(list, &arc);
             break;
 #endif
diff --git a/src/lv_themes/lv_theme_template.c b/src/lv_themes/lv_theme_template.c
index 0c557a01d..f29d9daf4 100644
--- a/src/lv_themes/lv_theme_template.c
+++ b/src/lv_themes/lv_theme_template.c
@@ -528,8 +528,8 @@ void lv_theme_material_apply(lv_obj_t * obj, lv_theme_style_t name)
             lv_style_list_add_style(list, &style_tick_line);
             lv_style_list_add_style(list, &style_round);
 
-            lv_obj_clean_style_list(obj, LV_ARC_PART_ARC);
-            list = lv_obj_get_style_list(obj, LV_ARC_PART_ARC);
+            lv_obj_clean_style_list(obj, LV_ARC_PART_INDIC);
+            list = lv_obj_get_style_list(obj, LV_ARC_PART_INDIC);
             lv_style_list_add_style(list, &style_bg);
             lv_style_list_add_style(list, &style_color);
             lv_style_list_add_style(list, &style_tick_line);
diff --git a/src/lv_widgets/lv_arc.c b/src/lv_widgets/lv_arc.c
index e4b72e265..ff3862f01 100644
--- a/src/lv_widgets/lv_arc.c
+++ b/src/lv_widgets/lv_arc.c
@@ -368,13 +368,13 @@ static lv_design_res_t lv_arc_design(lv_obj_t * arc, const lv_area_t * clip_area
 
         lv_draw_rect(&arc->coords, clip_area, &bg_dsc);
 
-        lv_coord_t left = lv_obj_get_style_pad_left(arc, LV_ARC_PART_BG);
-        lv_coord_t right = lv_obj_get_style_pad_right(arc, LV_ARC_PART_BG);
-        lv_coord_t top = lv_obj_get_style_pad_top(arc, LV_ARC_PART_BG);
-        lv_coord_t bottom = lv_obj_get_style_pad_bottom(arc, LV_ARC_PART_BG);
-        lv_coord_t r       = (LV_MATH_MIN(lv_obj_get_width(arc) - left - right, lv_obj_get_height(arc) - top - bottom)) / 2;
-        lv_coord_t x       = arc->coords.x1 + r + left;
-        lv_coord_t y       = arc->coords.y1 + r + top;
+        lv_coord_t left_bg = lv_obj_get_style_pad_left(arc, LV_ARC_PART_BG);
+        lv_coord_t right_bg = lv_obj_get_style_pad_right(arc, LV_ARC_PART_BG);
+        lv_coord_t top_bg = lv_obj_get_style_pad_top(arc, LV_ARC_PART_BG);
+        lv_coord_t bottom_bg = lv_obj_get_style_pad_bottom(arc, LV_ARC_PART_BG);
+        lv_coord_t r       = (LV_MATH_MIN(lv_obj_get_width(arc) - left_bg - right_bg, lv_obj_get_height(arc) - top_bg - bottom_bg)) / 2;
+        lv_coord_t x       = arc->coords.x1 + r + left_bg;
+        lv_coord_t y       = arc->coords.y1 + r + top_bg;
 
         lv_draw_line_dsc_t arc_dsc;
         lv_draw_line_dsc_init(&arc_dsc);
@@ -383,7 +383,14 @@ static lv_design_res_t lv_arc_design(lv_obj_t * arc, const lv_area_t * clip_area
         lv_draw_arc(x, y, r, ext->bg_angle_start, ext->bg_angle_end, clip_area, &arc_dsc);
 
         lv_draw_line_dsc_init(&arc_dsc);
-        lv_obj_init_draw_line_dsc(arc, LV_ARC_PART_ARC, &arc_dsc);
+        lv_obj_init_draw_line_dsc(arc, LV_ARC_PART_INDIC, &arc_dsc);
+
+        /*make the indicator arc smaller or larger according to its greatest padding value*/
+        lv_coord_t left_indic = lv_obj_get_style_pad_left(arc, LV_ARC_PART_INDIC);
+        lv_coord_t right_indic = lv_obj_get_style_pad_right(arc, LV_ARC_PART_INDIC);
+        lv_coord_t top_indic = lv_obj_get_style_pad_top(arc, LV_ARC_PART_INDIC);
+        lv_coord_t bottom_indic = lv_obj_get_style_pad_bottom(arc, LV_ARC_PART_INDIC);
+        r-= LV_MATH_MAX4(left_indic, right_indic, top_indic, bottom_indic);
 
         lv_draw_arc(x, y, r, ext->arc_angle_start, ext->arc_angle_end, clip_area, &arc_dsc);
     }
@@ -418,7 +425,7 @@ static lv_res_t lv_arc_signal(lv_obj_t * arc, lv_signal_t sign, void * param)
     if(sign == LV_SIGNAL_GET_TYPE) return lv_obj_handle_get_type_signal(param, LV_OBJX_NAME);
 
     if(sign == LV_SIGNAL_CLEANUP) {
-        lv_obj_clean_style_list(arc, LV_ARC_PART_ARC);
+        lv_obj_clean_style_list(arc, LV_ARC_PART_INDIC);
     }
 
     return res;
@@ -442,7 +449,7 @@ static lv_style_list_t * lv_arc_get_style(lv_obj_t * arc, uint8_t part)
         case LV_ARC_PART_BG:
             style_dsc_p = &arc->style_list;
             break;
-        case LV_ARC_PART_ARC:
+        case LV_ARC_PART_INDIC:
             style_dsc_p = &ext->style_arc;
             break;
         default:
@@ -467,8 +474,8 @@ static void inv_arc_area(lv_obj_t * arc, uint16_t start_angle, uint16_t end_angl
     lv_coord_t rout       = (LV_MATH_MIN(lv_obj_get_width(arc) - left - right, lv_obj_get_height(arc) - top - bottom)) / 2;
     lv_coord_t x       = arc->coords.x1 + rout + left;
     lv_coord_t y       = arc->coords.y1 + rout + top;
-    lv_style_int_t w = lv_obj_get_style_line_width(arc, LV_ARC_PART_ARC);
-    lv_style_int_t rounded = lv_obj_get_style_line_rounded(arc, LV_ARC_PART_ARC);
+    lv_style_int_t w = lv_obj_get_style_line_width(arc, LV_ARC_PART_INDIC);
+    lv_style_int_t rounded = lv_obj_get_style_line_rounded(arc, LV_ARC_PART_INDIC);
     lv_coord_t rin       = rout - w;
     lv_coord_t extra_area = rounded ? w / 2 + 2 : 0;
 
diff --git a/src/lv_widgets/lv_arc.h b/src/lv_widgets/lv_arc.h
index 2bae946e2..3ba8a7b2d 100644
--- a/src/lv_widgets/lv_arc.h
+++ b/src/lv_widgets/lv_arc.h
@@ -39,7 +39,7 @@ typedef struct {
 /*Parts of the arc*/
 enum {
     LV_ARC_PART_BG = LV_OBJ_PART_MAIN,
-    LV_ARC_PART_ARC,
+    LV_ARC_PART_INDIC,
     _LV_ARC_PART_VIRTUAL_LAST,
 
     _LV_ARC_PART_REAL_LAST = _LV_OBJ_PART_REAL_LAST,
diff --git a/src/lv_widgets/lv_bar.c b/src/lv_widgets/lv_bar.c
index b52e4bca6..e5ef4d824 100644
--- a/src/lv_widgets/lv_bar.c
+++ b/src/lv_widgets/lv_bar.c
@@ -412,7 +412,7 @@ static void draw_indic(lv_obj_t * bar, const lv_area_t * clip_area)
     int32_t range = ext->max_value - ext->min_value;
     bool hor = objw >= objh ? true : false;
     bool sym = false;
-    if(ext->type == LV_BAR_TYPE_SYM && ext->min_value < 0 && ext->max_value > 0 &&
+    if(ext->type == LV_BAR_TYPE_SYMMETRICAL && ext->min_value < 0 && ext->max_value > 0 &&
        ext->start_value == ext->min_value) sym = true;
 
     /*Calculate the indicator area*/
diff --git a/src/lv_widgets/lv_bar.h b/src/lv_widgets/lv_bar.h
index 286311e69..1b624a193 100644
--- a/src/lv_widgets/lv_bar.h
+++ b/src/lv_widgets/lv_bar.h
@@ -45,7 +45,7 @@ extern "C" {
 
 enum {
     LV_BAR_TYPE_NORMAL,
-    LV_BAR_TYPE_SYM,
+    LV_BAR_TYPE_SYMMETRICAL,
     LV_BAR_TYPE_CUSTOM
 };
 typedef uint8_t lv_bar_type_t;
diff --git a/src/lv_widgets/lv_btnmatrix.c b/src/lv_widgets/lv_btnmatrix.c
index b4ec09e52..4a294356a 100644
--- a/src/lv_widgets/lv_btnmatrix.c
+++ b/src/lv_widgets/lv_btnmatrix.c
@@ -95,7 +95,7 @@ lv_obj_t * lv_btnmatrix_create(lv_obj_t * par, const lv_obj_t * copy)
     ext->ctrl_bits      = NULL;
     ext->map_p          = NULL;
     ext->recolor        = 0;
-    ext->one_toggle     = 0;
+    ext->one_check      = 0;
     lv_style_list_init(&ext->style_btn);
     ext->style_btn.ignore_trans = 1;
 
@@ -406,19 +406,17 @@ void lv_btnmatrix_set_btn_width(lv_obj_t * btnm, uint16_t btn_id, uint8_t width)
 
 /**
  * Make the button matrix like a selector widget (only one button may be toggled at a time).
- *
- * Toggling must be enabled on the buttons you want to be selected with `lv_btnmatrix_set_ctrl` or
+ * `Checkable` must be enabled on the buttons you want to be selected with `lv_btnmatrix_set_ctrl` or
  * `lv_btnmatrix_set_btn_ctrl_all`.
- *
  * @param btnm Button matrix object
- * @param one_toggle Whether "one toggle" mode is enabled
+ * @param one_chk Whether "one check" mode is enabled
  */
-void lv_btnmatrix_set_one_toggle(lv_obj_t * btnm, bool one_toggle)
+void lv_btnmatrix_set_one_check(lv_obj_t * btnm, bool one_chk)
 {
     LV_ASSERT_OBJ(btnm, LV_OBJX_NAME);
 
     lv_btnmatrix_ext_t * ext = lv_obj_get_ext_attr(btnm);
-    ext->one_toggle     = one_toggle;
+    ext->one_check     = one_chk;
 
     /*If more than one button is toggled only the first one should be*/
     make_one_button_toggled(btnm, 0);
@@ -552,17 +550,17 @@ bool lv_btnmatrix_get_btn_ctrl(lv_obj_t * btnm, uint16_t btn_id, lv_btnmatrix_ct
 
 
 /**
- * Find whether "one toggle" mode is enabled.
+ * Find whether "one check" mode is enabled.
  * @param btnm Button matrix object
- * @return whether "one toggle" mode is enabled
+ * @return whether "one check" mode is enabled
  */
-bool lv_btnmatrix_get_one_toggle(const lv_obj_t * btnm)
+bool lv_btnmatrix_get_one_check(const lv_obj_t * btnm)
 {
     LV_ASSERT_OBJ(btnm, LV_OBJX_NAME);
 
     lv_btnmatrix_ext_t * ext = lv_obj_get_ext_attr(btnm);
 
-    return ext->one_toggle;
+    return ext->one_check;
 }
 
 /**********************
@@ -867,7 +865,7 @@ static lv_res_t lv_btnmatrix_signal(lv_obj_t * btnm, lv_signal_t sign, void * pa
                 else {
                     ext->ctrl_bits[ext->btn_id_pr] |= LV_BTNMATRIX_CTRL_CHECK_STATE;
                 }
-                if(ext->one_toggle) make_one_button_toggled(btnm, ext->btn_id_pr);
+                if(ext->one_check) make_one_button_toggled(btnm, ext->btn_id_pr);
             }
 
             /*Invalidate to old pressed area*/;
@@ -1105,7 +1103,7 @@ static bool button_is_repeat_disabled(lv_btnmatrix_ctrl_t ctrl_bits)
 
 static bool button_is_inactive(lv_btnmatrix_ctrl_t ctrl_bits)
 {
-    return (ctrl_bits & LV_BTNMATRIX_CTRL_INACTIVE) ? true : false;
+    return (ctrl_bits & LV_BTNMATRIX_CTRL_DISABLED) ? true : false;
 }
 
 static bool button_is_click_trig(lv_btnmatrix_ctrl_t ctrl_bits)
diff --git a/src/lv_widgets/lv_btnmatrix.h b/src/lv_widgets/lv_btnmatrix.h
index 3369f47ac..6d404154f 100644
--- a/src/lv_widgets/lv_btnmatrix.h
+++ b/src/lv_widgets/lv_btnmatrix.h
@@ -38,7 +38,7 @@ LV_EXPORT_CONST_INT(LV_BTNMATRIX_BTN_NONE);
 enum {
     LV_BTNMATRIX_CTRL_HIDDEN     = 0x0008, /**< Button hidden */
     LV_BTNMATRIX_CTRL_NO_REPEAT  = 0x0010, /**< Do not repeat press this button. */
-    LV_BTNMATRIX_CTRL_INACTIVE   = 0x0020, /**< Disable this button. */
+    LV_BTNMATRIX_CTRL_DISABLED   = 0x0020, /**< Disable this button. */
     LV_BTNMATRIX_CTRL_CHECKABLE  = 0x0040, /**< Button *can* be toggled. */
     LV_BTNMATRIX_CTRL_CHECK_STATE  = 0x0080, /**< Button is currently toggled (e.g. checked). */
     LV_BTNMATRIX_CTRL_CLICK_TRIG = 0x0100, /**< 1: Send LV_EVENT_SELECTED on CLICK, 0: Send LV_EVENT_SELECTED on PRESS*/
@@ -58,7 +58,7 @@ typedef struct {
     uint16_t btn_id_focused;                          /*Index of the currently focused button or LV_BTNMATRIX_BTN_NONE*/
     uint16_t btn_id_act;    /*Index of the active button (being pressed/released etc) or LV_BTNMATRIX_BTN_NONE */
     uint8_t recolor : 1;    /*Enable button recoloring*/
-    uint8_t one_toggle : 1; /*Single button toggled at once*/
+    uint8_t one_check : 1;  /*Single button toggled at once*/
 } lv_btnmatrix_ext_t;
 
 enum {
@@ -172,14 +172,12 @@ void lv_btnmatrix_set_btn_width(lv_obj_t * btnm, uint16_t btn_id, uint8_t width)
 
 /**
  * Make the button matrix like a selector widget (only one button may be toggled at a time).
- *
- * Toggling must be enabled on the buttons you want to be selected with `lv_btnmatrix_set_ctrl` or
+ * `Checkable` must be enabled on the buttons you want to be selected with `lv_btnmatrix_set_ctrl` or
  * `lv_btnmatrix_set_btn_ctrl_all`.
- *
  * @param btnm Button matrix object
- * @param one_toggle Whether "one toggle" mode is enabled
+ * @param one_chk Whether "one check" mode is enabled
  */
-void lv_btnmatrix_set_one_toggle(lv_obj_t * btnm, bool one_toggle);
+void lv_btnmatrix_set_one_check(lv_obj_t * btnm, bool one_chk);
 
 /*=====================
  * Getter functions
@@ -247,7 +245,7 @@ bool lv_btnmatrix_get_btn_ctrl(lv_obj_t * btnm, uint16_t btn_id, lv_btnmatrix_ct
  * @param btnm Button matrix object
  * @return whether "one toggle" mode is enabled
  */
-bool lv_btnmatrix_get_one_toggle(const lv_obj_t * btnm);
+bool lv_btnmatrix_get_one_check(const lv_obj_t * btnm);
 /**********************
  *      MACROS
  **********************/
diff --git a/src/lv_widgets/lv_canvas.c b/src/lv_widgets/lv_canvas.c
index 085c9556a..bc1be27b3 100644
--- a/src/lv_widgets/lv_canvas.c
+++ b/src/lv_widgets/lv_canvas.c
@@ -262,8 +262,8 @@ void lv_canvas_copy_buf(lv_obj_t * canvas, const void * to_copy, lv_coord_t x, l
 
 /**
  * Transform and image and store the result on a canvas.
- * @param canvas pointer to a canvas object
- * @param img pointer to an image descriptor.
+ * @param canvas pointer to a canvas object to store the result of the transformation.
+ * @param img pointer to an image descriptor to transform.
  *             Can be the image descriptor of an other canvas too (`lv_canvas_get_img()`).
  * @param angle the angle of rotation (0..3600), 0.1 deg resolution
  * @param zoom zoom factor (256 no zoom);
diff --git a/src/lv_widgets/lv_canvas.h b/src/lv_widgets/lv_canvas.h
index ba45016ee..60de04c14 100644
--- a/src/lv_widgets/lv_canvas.h
+++ b/src/lv_widgets/lv_canvas.h
@@ -131,8 +131,8 @@ void lv_canvas_copy_buf(lv_obj_t * canvas, const void * to_copy, lv_coord_t x, l
 
 /**
  * Transform and image and store the result on a canvas.
- * @param canvas pointer to a canvas object
- * @param img pointer to an image descriptor.
+ * @param canvas pointer to a canvas object to store the result of the transformation.
+ * @param img pointer to an image descriptor to transform.
  *             Can be the image descriptor of an other canvas too (`lv_canvas_get_img()`).
  * @param angle the angle of rotation (0..3600), 0.1 deg resolution
  * @param zoom zoom factor (256 no zoom);
diff --git a/src/lv_widgets/lv_keyboard.c b/src/lv_widgets/lv_keyboard.c
index 916068c43..b81964bf2 100644
--- a/src/lv_widgets/lv_keyboard.c
+++ b/src/lv_widgets/lv_keyboard.c
@@ -340,7 +340,7 @@ void lv_keyboard_def_event_cb(lv_obj_t * kb, lv_event_t event)
     lv_keyboard_ext_t * ext = lv_obj_get_ext_attr(kb);
     uint16_t btn_id   = lv_btnmatrix_get_active_btn(kb);
     if(btn_id == LV_BTNMATRIX_BTN_NONE) return;
-    if(lv_btnmatrix_get_btn_ctrl(kb, btn_id, LV_BTNMATRIX_CTRL_HIDDEN | LV_BTNMATRIX_CTRL_INACTIVE)) return;
+    if(lv_btnmatrix_get_btn_ctrl(kb, btn_id, LV_BTNMATRIX_CTRL_HIDDEN | LV_BTNMATRIX_CTRL_DISABLED)) return;
     if(lv_btnmatrix_get_btn_ctrl(kb, btn_id, LV_BTNMATRIX_CTRL_NO_REPEAT) && event == LV_EVENT_LONG_PRESSED_REPEAT) return;
 
     const char * txt = lv_btnmatrix_get_active_btn_text(kb);
diff --git a/src/lv_widgets/lv_slider.c b/src/lv_widgets/lv_slider.c
index 58a8db97b..4c4e6a603 100644
--- a/src/lv_widgets/lv_slider.c
+++ b/src/lv_widgets/lv_slider.c
@@ -173,7 +173,7 @@ static lv_design_res_t lv_slider_design(lv_obj_t * slider, const lv_area_t * cli
         bool hor = objw >= objh ? true : false;
         lv_coord_t knob_size = hor ? objh : objw;
         bool sym = false;
-        if(ext->bar.type == LV_BAR_TYPE_SYM && ext->bar.min_value < 0 && ext->bar.max_value > 0) sym = true;
+        if(ext->bar.type == LV_BAR_TYPE_SYMMETRICAL && ext->bar.min_value < 0 && ext->bar.max_value > 0) sym = true;
 
         lv_area_t knob_area;
 
diff --git a/src/lv_widgets/lv_slider.h b/src/lv_widgets/lv_slider.h
index 1a49c1f94..869b62939 100644
--- a/src/lv_widgets/lv_slider.h
+++ b/src/lv_widgets/lv_slider.h
@@ -128,7 +128,7 @@ static inline void lv_slider_set_type(lv_obj_t * slider, lv_slider_type_t type)
     if(type == LV_SLIDER_TYPE_NORMAL)
         lv_bar_set_type(slider, LV_BAR_TYPE_NORMAL);
     else if(type == LV_SLIDER_TYPE_SYM)
-        lv_bar_set_type(slider, LV_BAR_TYPE_SYM);
+        lv_bar_set_type(slider, LV_BAR_TYPE_SYMMETRICAL);
     else if(type == LV_SLIDER_TYPE_RANGE)
         lv_bar_set_type(slider, LV_BAR_TYPE_CUSTOM);
 }
@@ -206,7 +206,7 @@ static inline uint16_t lv_slider_get_anim_time(lv_obj_t * slider)
 static inline lv_slider_type_t lv_slider_get_type(lv_obj_t * slider)
 {
     lv_bar_type_t type = lv_bar_get_type(slider);
-    if(type == LV_BAR_TYPE_SYM)
+    if(type == LV_BAR_TYPE_SYMMETRICAL)
         return LV_SLIDER_TYPE_SYM;
     else if(type == LV_BAR_TYPE_CUSTOM)
         return LV_SLIDER_TYPE_RANGE;
diff --git a/src/lv_widgets/lv_spinner.h b/src/lv_widgets/lv_spinner.h
index 99d6ede56..daa3361fb 100644
--- a/src/lv_widgets/lv_spinner.h
+++ b/src/lv_widgets/lv_spinner.h
@@ -70,7 +70,7 @@ typedef struct {
 /*Parts of the spinner*/
 enum {
     LV_SPINNER_PART_BG = LV_ARC_PART_BG,
-    LV_SPINNER_PART_ARC = LV_ARC_PART_ARC,
+    LV_SPINNER_PART_ARC = LV_ARC_PART_INDIC,
     _LV_SPINNER_PART_VIRTUAL_LAST,
 
     _LV_SPINNER_PART_REAL_LAST = _LV_ARC_PART_REAL_LAST,