diff --git a/Doxyfile b/Doxyfile
index 3fad410..d14de6b 100644
--- a/Doxyfile
+++ b/Doxyfile
@@ -6,8 +6,9 @@ OUTPUT_DIRECTORY = doxygen
 TAB_SIZE = 8
 OPTIMIZE_OUTPUT_FOR_C = YES
 MARKDOWN_SUPPORT = YES
-FILE_PATTERNS = *.h
+FILE_PATTERNS = *.h *.md
 INPUT = include/Mw
+INPUT += doc
 RECURSIVE = YES
 SOURCE_BROWSER = YES
 HTML_DYNAMIC_MENUS = YES
diff --git a/doc/LOWLEVEL.md b/doc/LOWLEVEL.md
new file mode 100644
index 0000000..f372979
--- /dev/null
+++ b/doc/LOWLEVEL.md
@@ -0,0 +1,11 @@
+# Writing a new widget
+@warning This is mainly for developers
+
+1. Create new file in src/widget with lower case
+2. Create new header in include/Mw/Widget with pascal case
+3. Add the header include to include/Mw/Milsko.h, if new widget does not require some extension (like OpenGL and Vulkan)
+4. See another widget for example
+
+## LowLevel.h function tips
+1. `MwLLSetSizeHints`, `MwLLMakeBorderless`, `MwLLMakeToolWindow`, `MwLLMakePopup` have to be called between `MwLLBeginStateChange` and `MwLLEndStateChange`
+
diff --git a/include/Mw/LowLevel.h b/include/Mw/LowLevel.h
index fc4f666..cc1d570 100644
--- a/include/Mw/LowLevel.h
+++ b/include/Mw/LowLevel.h
@@ -181,6 +181,9 @@ MWDECL void (*MwLLMakeBorderless)(MwLL handle, int toggle);
 MWDECL void (*MwLLMakeToolWindow)(MwLL handle);
 MWDECL void (*MwLLMakePopup)(MwLL handle, MwLL parent);
 
+MWDECL void (*MwLLBeginStateChange)(MwLL handle);
+MWDECL void (*MwLLEndStateChange)(MwLL handle);
+
 MWDECL void (*MwLLSetBackground)(MwLL handle, MwLLColor color);
 
 MWDECL void (*MwLLFocus)(MwLL handle);
diff --git a/src/backend/call.c b/src/backend/call.c
index 75475c6..117f5f9 100644
--- a/src/backend/call.c
+++ b/src/backend/call.c
@@ -41,6 +41,9 @@
 		MwLLMakeBorderless = MwLLMakeBorderlessImpl; \
 		MwLLMakeToolWindow = MwLLMakeToolWindowImpl; \
 		MwLLMakePopup	   = MwLLMakePopupImpl; \
+\
+		MwLLBeginStateChange = MwLLBeginStateChangeImpl; \
+		MwLLEndStateChange = MwLLEndStateChangeImpl; \
 \
 		MwLLSetBackground = MwLLSetBackgroundImpl; \
 \
diff --git a/src/backend/gdi.c b/src/backend/gdi.c
index 94615a6..cd1f2f2 100644
--- a/src/backend/gdi.c
+++ b/src/backend/gdi.c
@@ -706,6 +706,14 @@ static void MwLLMakeToolWindowImpl(MwLL handle) {
 	SetWindowPos(handle->gdi.hWnd, NULL, 0, 0, rc.right - rc.left, rc.bottom - rc.top, SWP_FRAMECHANGED | SWP_NOACTIVATE | SWP_NOMOVE | SWP_NOZORDER);
 }
 
+static void MwLLBeginStateChangeImpl(MwLL handle){
+	(void)handle;
+}
+
+static void MwLLEndStateChangeImpl(MwLL handle){
+	(void)handle;
+}
+
 static int MwLLGDICallInitImpl(void) {
 	/* TODO: check properly */
 	return 0;
diff --git a/src/backend/x11.c b/src/backend/x11.c
index cf6f13f..afc5e73 100644
--- a/src/backend/x11.c
+++ b/src/backend/x11.c
@@ -80,7 +80,6 @@ static void wait_map(MwLL handle) {
 
 	XGetWindowAttributes(handle->x11.display, handle->x11.window, &xwa);
 	if(xwa.map_state != IsViewable) {
-
 		XSync(handle->x11.display, False);
 
 		XMapWindow(handle->x11.display, handle->x11.window);
@@ -972,6 +971,14 @@ static void MwLLMakeToolWindowImpl(MwLL handle) {
 	XChangeProperty(handle->x11.display, handle->x11.window, wndtype, XA_ATOM, 32, PropModeReplace, (unsigned char*)&wndmenu, 1);
 }
 
+static void MwLLBeginStateChangeImpl(MwLL handle){
+	MwLLShow(handle, 0);
+}
+
+static void MwLLEndStateChangeImpl(MwLL handle){
+	MwLLShow(handle, 1);
+}
+
 static int MwLLX11CallInitImpl(void) {
 	/* TODO: check properly */
 	return 0;
diff --git a/src/dialog/colorpicker.c b/src/dialog/colorpicker.c
index 8254595..0a7032c 100644
--- a/src/dialog/colorpicker.c
+++ b/src/dialog/colorpicker.c
@@ -375,10 +375,10 @@ MwWidget MwColorPicker(MwWidget handle, const char* title) {
 	MwAddUserHandler(window, MwNtickHandler, color_picker_tick, wheel);
 	MwAddTickList(window);
 
-	MwLLShow(window->lowlevel, 0);
+	MwLLBeginStateChange(window->lowlevel);
 	MwLLDetach(window->lowlevel, &p);
 	MwLLMakePopup(window->lowlevel, handle->lowlevel);
-	MwLLShow(window->lowlevel, 1);
+	MwLLEndStateChange(window->lowlevel);
 
 	return window;
 }
diff --git a/src/dialog/filechooser.c b/src/dialog/filechooser.c
index ee87160..fe73d23 100644
--- a/src/dialog/filechooser.c
+++ b/src/dialog/filechooser.c
@@ -501,10 +501,10 @@ MwWidget MwFileChooser(MwWidget handle, const char* title) {
 	scan(window, path, 1);
 	free(path);
 
-	MwLLShow(handle->lowlevel, 0);
+	MwLLBeginStateChange(window->lowlevel);
 	MwLLDetach(window->lowlevel, &p);
 	MwLLMakePopup(window->lowlevel, handle->lowlevel);
-	MwLLShow(handle->lowlevel, 1);
+	MwLLEndStateChange(window->lowlevel);
 
 	return window;
 }
diff --git a/src/dialog/messagebox.c b/src/dialog/messagebox.c
index a87902b..a4fb0cb 100644
--- a/src/dialog/messagebox.c
+++ b/src/dialog/messagebox.c
@@ -99,11 +99,11 @@ MwWidget MwMessageBox(MwWidget handle, const char* text, const char* title, unsi
 			       MwNalignment, MwALIGNMENT_BEGINNING,
 			       NULL);
 
-	MwLLShow(window->lowlevel, 0);
+	MwLLBeginStateChange(window->lowlevel);
 	MwLLDetach(window->lowlevel, &p);
 	MwLLSetSizeHints(window->lowlevel, w, h, w, h);
 	MwLLMakePopup(window->lowlevel, handle->lowlevel);
-	MwLLShow(window->lowlevel, 1);
+	MwLLEndStateChange(window->lowlevel);
 
 	MwAddUserHandler(window, MwNcloseHandler, messagebox_close, NULL);
 
diff --git a/src/lowlevel.c b/src/lowlevel.c
index 41736d3..6a06e29 100644
--- a/src/lowlevel.c
+++ b/src/lowlevel.c
@@ -37,6 +37,9 @@ void (*MwLLMakeBorderless)(MwLL handle, int toggle);
 void (*MwLLMakeToolWindow)(MwLL handle);
 void (*MwLLMakePopup)(MwLL handle, MwLL parent);
 
+void (*MwLLBeginStateChange)(MwLL handle);
+void (*MwLLEndStateChange)(MwLL handle);
+
 void (*MwLLSetBackground)(MwLL handle, MwLLColor color);
 
 void (*MwLLFocus)(MwLL handle);
diff --git a/src/widget/submenu.c b/src/widget/submenu.c
index 56bbf34..0dd0ad5 100644
--- a/src/widget/submenu.c
+++ b/src/widget/submenu.c
@@ -4,7 +4,7 @@
 #include "../../external/stb_ds.h"
 
 static int create(MwWidget handle) {
-	MwLLShow(handle->lowlevel, 0);
+	MwLLBeginStateChange(handle->lowlevel);
 
 	MwSetDefault(handle);
 
@@ -167,7 +167,7 @@ static void mwSubMenuAppearImpl(MwWidget handle, MwMenu menu, MwPoint* point) {
 
 	MwLLMakeToolWindow(handle->lowlevel);
 	MwLLDetach(handle->lowlevel, point);
-	MwLLShow(handle->lowlevel, 1);
+	MwLLEndStateChange(handle->lowlevel);
 
 	for(i = 0; i < arrlen(menu->sub); i++) {
 		if(strcmp(menu->sub[i]->name, "----") == 0) {
diff --git a/src/widget/window.c b/src/widget/window.c
index fff2ce9..b5b594a 100644
--- a/src/widget/window.c
+++ b/src/widget/window.c
@@ -21,9 +21,9 @@ static void draw(MwWidget handle) {
 	MwLLFreeColor(c);
 }
 static void mwWindowMakeBorderlessImpl(MwWidget handle, int toggle) {
-	MwLLShow(handle->lowlevel, 0);
+	MwLLBeginStateChange(handle->lowlevel);
 	MwLLMakeBorderless(handle->lowlevel, toggle);
-	MwLLShow(handle->lowlevel, 1);
+	MwLLEndStateChange(handle->lowlevel);
 }
 
 static void func_handler(MwWidget handle, const char* name, void* out, va_list va) {