diff --git a/example/ask.c b/example/ask.c
index 371776a..d84d242 100644
--- a/example/ask.c
+++ b/example/ask.c
@@ -28,15 +28,15 @@ i32 main(i32 argc, char** argv) {
             tim_frame(0, 0, ~0, ~0, CFR);
 
             // draw message
-            label(argv[1], A, 1, msg.width, msg.lines, CTXT);
+            tim_label(argv[1], A, 1, msg.width, msg.lines, CTXT);
 
             // draw 'yes' button, return 0 when clicked
-            if (button("[y] Yes", 2, ~1, A, A, CYES) || tim_is_key_press('y')) {
+            if (tim_button("[y] Yes", 2, ~1, A, A, CYES) || tim_is_key_press('y')) {
                 exit(0);
             }
 
             // draw 'no' button, return 1 when clicked
-            if (button("[n] No", ~2, ~1, A, A, CNO) || tim_is_key_press('n')) {
+            if (tim_button("[n] No", ~2, ~1, A, A, CNO) || tim_is_key_press('n')) {
                 exit(1);
             }
 
diff --git a/example/hello.c b/example/hello.c
index 2864034..328de35 100644
--- a/example/hello.c
+++ b/example/hello.c
@@ -5,8 +5,8 @@ i32 main(void) {
         tim_scope(A, A, 24, 8) {                // centered 24x8 scope
             u64 c = 0x0a060f;                   // three colors
             tim_frame(0, 0, ~0, ~0, c);         // draw frame for scope
-            label("Greetings!", A, 2, A, A, c); // label in top center
-            if (button("OK", A, ~1, 8, A, c))   // button in bottom center
+            tim_label("Greetings!", A, 2, A, A, c); // label in top center
+            if (tim_button("OK", A, ~1, 8, A, c))   // button in bottom center
                 return 0;                       // exit on button click
             if (tim_is_key_press('q'))          // ctrl-c is masked
                 return 0;                       // exit on 'q' press
diff --git a/example/snek.c b/example/snek.c
index 63a86e7..278be84 100644
--- a/example/snek.c
+++ b/example/snek.c
@@ -102,14 +102,14 @@ static void menu(void) {
     tim_scope(A, A, 20, 13) {
         char* lbl = snek.state == OVER ? "GAME OVER" : "SNEK - THE GAME";
         char* btn = snek.state == PAUSE ? "Resume" : "Play";
-        label(lbl, A, 0, A, A, BTN);
-        if (button(btn, A, 2, 20, 5, BTN) || tim_is_key_press(TimKey_Enter)) {
+        tim_label(lbl, A, 0, A, A, BTN);
+        if (tim_button(btn, A, 2, 20, 5, BTN) || tim_is_key_press(TimKey_Enter)) {
             if (snek.state != PAUSE) {
                 start();
             }
             snek.state = RUN;
         }
-        if (button("Exit", A, 8, 20, 5, BTN) || tim_is_key_press('q') || tim_is_key_press(TimKey_Escape)) {
+        if (tim_button("Exit", A, 8, 20, 5, BTN) || tim_is_key_press('q') || tim_is_key_press(TimKey_Escape)) {
             exit(0);
         }
     }
diff --git a/include/tim.h b/include/tim.h
index dcc7ea5..89e72df 100644
--- a/include/tim.h
+++ b/include/tim.h
@@ -78,7 +78,6 @@ enum {
     TimKey_Tab              = 9,
     TimKey_Enter            = 13,
     TimKey_Escape           = 27,
-    /* printable utf8 characters */
     TimKey_Insert           = -1,
     TimKey_Delete           = -2,
     TimKey_Home             = -3,
@@ -90,6 +89,7 @@ enum {
     TimKey_Left             = -9,
     TimKey_Right            = -10,
 };
+// key code or 32-bit unicode char
 typedef i32 TimKey;
 
 #pragma endregion
@@ -222,36 +222,36 @@ void tim_frame(i32 x, i32 y, i32 w, i32 h, u64 color);
 // text label
 // str  : text - supports multiple lines
 // color: background, text
-void label(cstr s, i32 x, i32 y, i32 w, i32 h, u64 color);
+void tim_label(cstr s, i32 x, i32 y, i32 w, i32 h, u64 color);
 
 // button - returns true on click
 // color: frame, background, text
-bool button(cstr txt, i32 x, i32 y, i32 w, i32 h, u64 color);
+bool tim_button(cstr txt, i32 x, i32 y, i32 w, i32 h, u64 color);
 
 // check box - returns true when clicked
 // txt  : text label
 // state: persistent state, 0 unchecked, -1 semi checked, !0: checked
 // color: check, background, text
-bool check(cstr txt, i32* state, i32 x, i32 y, i32 w, u64 color);
+bool tim_checkbox(cstr txt, i32* state, i32 x, i32 y, i32 w, u64 color);
 
 // radio button - return true when clicked
 // txt  : text label
 // state: persistent state, selected if *state == v
 // v    : value
 // color: radio, background, text
-bool radio(cstr txt, i32* state, i32 v, i32 x, i32 y, i32 w, u64 color);
+bool tim_radiobutton(cstr txt, i32* state, i32 v, i32 x, i32 y, i32 w, u64 color);
 
 /// text edit - value in state
 /// @param e persistent edit state, use TimEditState_init() to create new state
 /// @param color frame, background, text
 /// @return key id or 0
-i32 edit(TimEditState* e, i32 x, i32 y, i32 w, u64 color);
+i32 tim_edit(TimEditState* e, i32 x, i32 y, i32 w, u64 color);
 
 void TimEditState_init(TimEditState* e, i32 capacity, cstr initial_content);
 
-void edit_insert(TimEditState* e, cstr s);
+void TimEditState_insert(TimEditState* e, cstr s);
 
-void edit_delete(TimEditState* e);
+void TimEditState_delete(TimEditState* e);
 
 #pragma endregion
 
diff --git a/src/edit.c b/src/edit.c
index 00a3407..1077f6c 100755
--- a/src/edit.c
+++ b/src/edit.c
@@ -11,7 +11,7 @@ void TimEditState_init(TimEditState* e, i32 capacity, cstr initial_content){
     e->s[byte_len] = 0;
 }
 
-void edit_insert(TimEditState* e, cstr s) {
+void TimEditState_insert(TimEditState* e, cstr s) {
     i32 dst_size = tim_ztrlen(e->s);
     i32 src_size = tim_ztrlen(s);
     if (dst_size + src_size < e->capacity) {
@@ -25,7 +25,7 @@ void edit_insert(TimEditState* e, cstr s) {
     }
 }
 
-void edit_delete(TimEditState* e) {
+void TimEditState_delete(TimEditState* e) {
     i32 size = tim_ztrlen(e->s);
     i32 cur  = tim_utf8_pos(e->s, e->cursor);
     i32 len  = tim_utf8_pos(e->s + cur, 1);
@@ -55,12 +55,12 @@ static i32 edit_event(TimEditState* e, TimRect r) {
         tim->focus = 0; // release focus
         break;
     case TimKey_Delete:
-        edit_delete(e);
+        TimEditState_delete(e);
         break;
     case TimKey_Backspace:
         if (e->cursor > 0) {
             e->cursor -= 1;
-            edit_delete(e);
+            TimEditState_delete(e);
         }
         break;
     case TimKey_Left:
@@ -77,7 +77,7 @@ static i32 edit_event(TimEditState* e, TimRect r) {
         break;
     default:
         if (tim->event.key >= ' ') {
-            edit_insert(e, tim->event.s);
+            TimEditState_insert(e, tim->event.s);
         }
         break;
     }
@@ -85,7 +85,7 @@ static i32 edit_event(TimEditState* e, TimRect r) {
     return tim->event.key;
 }
 
-i32 edit(TimEditState* e, i32 x, i32 y, i32 w, u64 color) {
+i32 tim_edit(TimEditState* e, i32 x, i32 y, i32 w, u64 color) {
     TimRect r = tim_scope_rect_to_absolute(x, y, w, 3);
 
     if (tim->event.type == TimEvent_Draw) {
diff --git a/src/unix.c b/src/unix.c
index acfcd3c..236b4d1 100755
--- a/src/unix.c
+++ b/src/unix.c
@@ -68,7 +68,7 @@ bool parse_input(event* restrict e, i32 n) {
     if (n == 1 || s[0] != 27) {
         // regular key press
         e->type = TimEvent_Key;
-        e->key  = s[0] == 127 ? TimKey_Backspace : tim_utf8_to_i32(s);
+        e->key = s[0] == 127 ? TimKey_Backspace : tim_utf8_to_i32(s);
         return true;
     }
 
@@ -110,7 +110,7 @@ bool parse_input(event* restrict e, i32 n) {
         for (i32 i = 0; i < (i32)ARRAY_SIZE(key_table); i++) {
             if (!memcmp(s + 1, key_table[i].s, n - 1)) {
                 e->type = TimEvent_Key;
-                e->key  = key_table[i].k;
+                e->key = key_table[i].k;
                 return true;
             }
         }
diff --git a/src/widgets.c b/src/widgets.c
index 69f6b01..eacb1ff 100755
--- a/src/widgets.c
+++ b/src/widgets.c
@@ -7,7 +7,7 @@ void tim_frame(i32 x, i32 y, i32 w, i32 h, u64 color) {
     }
 }
 
-void label(cstr s, i32 x, i32 y, i32 w, i32 h, u64 color) {
+void tim_label(cstr s, i32 x, i32 y, i32 w, i32 h, u64 color) {
     if (tim->event.type == TimEvent_Draw) {
         TimText t = tim_scan_str(s);
         w = (w == A) ? t.width : w;
@@ -22,7 +22,7 @@ void label(cstr s, i32 x, i32 y, i32 w, i32 h, u64 color) {
     }
 }
 
-bool button(cstr txt, i32 x, i32 y, i32 w, i32 h, u64 color) {
+bool tim_button(cstr txt, i32 x, i32 y, i32 w, i32 h, u64 color) {
     i32 tw = tim_utf8_len(txt);
     w      = (w == A) ? (tw + 4) : w;
     h      = (h == A) ? 3 : h;
@@ -35,7 +35,7 @@ bool button(cstr txt, i32 x, i32 y, i32 w, i32 h, u64 color) {
     return tim_is_mouse_click_over(r);
 }
 
-bool check(cstr txt, i32* state, i32 x, i32 y, i32 w, u64 color) {
+bool tim_checkbox(cstr txt, i32* state, i32 x, i32 y, i32 w, u64 color) {
     w = (w == A) ? tim_utf8_len(txt) + 4 : w;
     TimRect r = tim_scope_rect_to_absolute(x, y, w, 1);
 
@@ -52,7 +52,7 @@ bool check(cstr txt, i32* state, i32 x, i32 y, i32 w, u64 color) {
 }
 
 
-bool radio(cstr txt, i32* state, i32 v, i32 x, i32 y, i32 w, u64 color) {
+bool tim_radiobutton(cstr txt, i32* state, i32 v, i32 x, i32 y, i32 w, u64 color) {
     w = (w == A) ? tim_utf8_len(txt) + 4 : w;
     TimRect r = tim_scope_rect_to_absolute(x, y, w, 1);
 
diff --git a/src/windows.c b/src/windows.c
index b7d98b0..987ee42 100755
--- a/src/windows.c
+++ b/src/windows.c
@@ -149,7 +149,7 @@ void tim_read_event(i32 timeout_ms) {
             }
             tim_update_screen_size(); // workaround, see WINDOW_BUFFER_SIZE_EVENT
             e->type = TimEvent_Mouse;
-            e->key  = TimKey_MouseButtonLeft;
+            e->key = TimKey_MouseButtonLeft;
             e->x    = rec.Event.MouseEvent.dwMousePosition.X - tim->window.Left;
             e->y    = rec.Event.MouseEvent.dwMousePosition.Y - tim->window.Top;
             return;
diff --git a/test/test.c b/test/test.c
index f03350f..33f0a8d 100644
--- a/test/test.c
+++ b/test/test.c
@@ -10,55 +10,55 @@ static inline void test_screen(TimEvent* e) {
     me = (e->type == MOUSE_EVENT) ? *e : me;
 
     // positioning
-    label("+",  0,  0, A, A, 0xf);
-    label("+", ~0,  0, A, A, 0xf);
-    label("+",  0, ~0, A, A, 0xf);
-    label("+", ~0, ~0, A, A, 0xf);
-    label("+",  A,  A, A, A, 0xf);
-    label("-",  0,  A, A, A, 0xf);
-    label("-", ~0,  A, A, A, 0xf);
-    label("|",  A,  0, A, A, 0xf);
-    label("|",  A, ~0, A, A, 0xf);
+    tim_label("+",  0,  0, A, A, 0xf);
+    tim_label("+", ~0,  0, A, A, 0xf);
+    tim_label("+",  0, ~0, A, A, 0xf);
+    tim_label("+", ~0, ~0, A, A, 0xf);
+    tim_label("+",  A,  A, A, A, 0xf);
+    tim_label("-",  0,  A, A, A, 0xf);
+    tim_label("-", ~0,  A, A, A, 0xf);
+    tim_label("|",  A,  0, A, A, 0xf);
+    tim_label("|",  A, ~0, A, A, 0xf);
 
     // some information
     sprintf(buf, "screen: %dx%d", tim->w, tim->h);
-    label(buf, 2, 0, A, A, 0xf);
+    tim_label(buf, 2, 0, A, A, 0xf);
     sprintf(buf, "frame : [%c] %d",  ": "[tim->frame & 1], tim->frame);
-    label(buf, 2, 1, A, A, 0xf);
+    tim_label(buf, 2, 1, A, A, 0xf);
     sprintf(buf, "key   : [%d] %s", ke.key, ke.s + (ke.key < 32));
-    label(buf, 2, 2, A, A, 0xf);
+    tim_label(buf, 2, 2, A, A, 0xf);
     sprintf(buf, "mouse : [%d] %d:%d", me.key, me.x, me.y);
-    label(buf, 2, 3, A, A, 0xf);
+    tim_label(buf, 2, 3, A, A, 0xf);
     sprintf(buf, "input : %02hhx %02hhx %02hhx %02hhx %02hhx %02hhx %02hhx %02hhx",
             e->s[0], e->s[1], e->s[2], e->s[3], e->s[4], e->s[5], e->s[6], e->s[7]);
-    label(buf, 2, 4, A, A, 0xf);
+    tim_label(buf, 2, 4, A, A, 0xf);
 
     // lower right
     render_us += tim->render_us;
     sprintf(buf, "%d µs (Ø %d µs)", tim->render_us, render_us / MAX(tim->frame, 1));
-    label(buf, ~2, ~2, A, A, 0xf);
+    tim_label(buf, ~2, ~2, A, A, 0xf);
     sprintf(buf, "%d cells (%.0f %%)", tim->w * tim->h, 100.0 * tim->w * tim->h / TIM_MAX_CELLS);
-    label(buf, ~2, ~1, A, A, 0xf);
+    tim_label(buf, ~2, ~1, A, A, 0xf);
     sprintf(buf, "%d bytes (%.0f %%)", tim->buf_size, 100.0 * tim->buf_size / TIM_MAX_BUF);
-    label(buf, ~2, ~0, A, A, 0xf);
+    tim_label(buf, ~2, ~0, A, A, 0xf);
 
     // multi line label
-    label("multi\nliñe\nlabël", 24, 1, A, A, 0xf);
+    tim_label("multi\nliñe\nlabël", 24, 1, A, A, 0xf);
 
     // colors
     tim_scope(1, 5, 16, 5) {
         tim_frame(0, 0, ~0, ~0, 0xf);
-        label(" Red   ", 1, 1, 7, A, 0x0900);
-        label("       ", 8, 1, 7, A, 0xc400);
-        label(" Green ", 1, 2, 7, A, 0x0a00);
-        label("       ", 8, 2, 7, A, 0x2e00);
-        label(" Blue  ", 1, 3, 7, A, 0x0c00);
-        label("       ", 8, 3, 7, A, 0x1500);
+        tim_label(" Red   ", 1, 1, 7, A, 0x0900);
+        tim_label("       ", 8, 1, 7, A, 0xc400);
+        tim_label(" Green ", 1, 2, 7, A, 0x0a00);
+        tim_label("       ", 8, 2, 7, A, 0x2e00);
+        tim_label(" Blue  ", 1, 3, 7, A, 0x0c00);
+        tim_label("       ", 8, 3, 7, A, 0x1500);
     }
 
     // button
     static u64 bc = 0x100;
-    if (button("Click Me", 17, 5, 16, 5, bc)) {
+    if (tim_button("Click Me", 17, 5, 16, 5, bc)) {
         bc = (bc + 0x100) & 0xff00;
     }
 
@@ -67,23 +67,23 @@ static inline void test_screen(TimEvent* e) {
     static TimEditState ed2;
     TimEditState_init(&ed1, 32, "Edit 1");
     TimEditState_init(&ed2, 32, "");
-    edit(&ed1, 1, 10, 32, 0xff00ff);
+    tim_edit(&ed1, 1, 10, 32, 0xff00ff);
     sprintf(buf, "cursor: %d length: %d", ed1.cursor, ed1.length);
-    label(buf, 2, 13, A, A, 0xf);
-    edit(&ed2, 1, 14, 32, 0xff00ff);
-    label(ed2.s, 2, 17, A, A, 0xf);
+    tim_label(buf, 2, 13, A, A, 0xf);
+    tim_edit(&ed2, 1, 14, 32, 0xff00ff);
+    tim_label(ed2.s, 2, 17, A, A, 0xf);
 
     // checkbox
     static i32 chk[2] = {-1, 1};
-    check("Check 1", &chk[0],  1, 18, A, 0xa000f);
-    check("Check 2", &chk[1], 14, 18, A, 0xa000f);
+    tim_checkbox("Check 1", &chk[0],  1, 18, A, 0xa000f);
+    tim_checkbox("Check 2", &chk[1], 14, 18, A, 0xa000f);
 
     // radiobox
     static i32 rad = 0;
-    radio("Radio 1", &rad, 1,  1, 19, A, 0xa000f);
-    radio("Radio 2", &rad, 2, 14, 19, A, 0xa000f);
-    radio("Radio 3", &rad, 3,  1, 20, A, 0xa000f);
-    radio("Radio 4", &rad, 4, 14, 20, A, 0xa000f);
+    tim_radiobutton("Radio 1", &rad, 1,  1, 19, A, 0xa000f);
+    tim_radiobutton("Radio 2", &rad, 2, 14, 19, A, 0xa000f);
+    tim_radiobutton("Radio 3", &rad, 3,  1, 20, A, 0xa000f);
+    tim_radiobutton("Radio 4", &rad, 4, 14, 20, A, 0xa000f);
 
     // scope nesting
     tim_scope(~1, 1, 20, 10) {
@@ -104,9 +104,9 @@ static inline void test_screen(TimEvent* e) {
     // funny characters
     tim_scope(~1, ~3, 11, 5) {
         tim_frame(0, 0, ~0, ~0, 0xf);
-        label("123456789", 1, 1, 9, A, 0x0f05);
-        label("$£ह€𐍈6789", 1, 2, A, A, 0x0f05);
-        label("圍棋56789", 1, 3, A, A, 0x0f05);
+        tim_label("123456789", 1, 1, 9, A, 0x0f05);
+        tim_label("$£ह€𐍈6789", 1, 2, A, A, 0x0f05);
+        tim_label("圍棋56789", 1, 3, A, A, 0x0f05);
     }
 }