diff --git a/avr/modules/lcd2/gui2/base/hlayout.asm b/avr/modules/lcd2/gui2/base/hlayout.asm
index a9b7c74..53f96e7 100644
--- a/avr/modules/lcd2/gui2/base/hlayout.asm
+++ b/avr/modules/lcd2/gui2/base/hlayout.asm
@@ -91,9 +91,10 @@ HLayout_Init:
 HLayout_OnLayout:
   rcall hLayoutHorizontally
   rcall hLayoutVerticalAdjust
-  ; force re-drawing of this widget
+  ; force re-drawing of this widget, clear layout bit
   ldd r16, Y+OBJECT_OFFS_FLAGS
-  ori r16, (1<<WIDGET_FLAGS_DIRTY_BIT)
+  sbr r16, (1<<WIDGET_FLAGS_DIRTY_BIT)
+  cbr r16, (1<<WIDGET_FLAGS_LAYOUT_BIT)
   std Y+OBJECT_OFFS_FLAGS, r16
   sec
   ret
diff --git a/avr/modules/lcd2/gui2/base/mainwindow.asm b/avr/modules/lcd2/gui2/base/mainwindow.asm
index 6db821e..e8ca06f 100644
--- a/avr/modules/lcd2/gui2/base/mainwindow.asm
+++ b/avr/modules/lcd2/gui2/base/mainwindow.asm
@@ -79,21 +79,6 @@ MainWindow_Init:
   ldi r16, HIGH(MainWindow_DefaultSignalmap*2)
   std Y+OBJECT_OFFS_SIGNALMAP_HI, r16
 
-  ; set pos and size of widget to display size
-  clr r16
-  std Y+WIDGET_OFFS_X_LO, r16
-  std Y+WIDGET_OFFS_X_HI, r16
-  std Y+WIDGET_OFFS_Y_LO, r16
-  std Y+WIDGET_OFFS_Y_HI, r16
-  ldi r16, LOW(DISPLAY_WIDTH)
-  std Y+WIDGET_OFFS_WIDTH_LO, r16
-  ldi r16, HIGH(DISPLAY_WIDTH)
-  std Y+WIDGET_OFFS_WIDTH_HI, r16
-  ldi r16, LOW(DISPLAY_HEIGHT)
-  std Y+WIDGET_OFFS_HEIGHT_LO, r16
-  ldi r16, HIGH(DISPLAY_HEIGHT)
-  std Y+WIDGET_OFFS_HEIGHT_HI, r16
-
   ldi r16, LOW(MainWindow_DefaultStyle)
   std Y+WIDGET_OFFS_STYLE_LO, r16
   ldi r16, HIGH(MainWindow_DefaultStyle)
diff --git a/avr/modules/lcd2/gui2/base/rootwindow.asm b/avr/modules/lcd2/gui2/base/rootwindow.asm
index 077fd88..d69e4b2 100644
--- a/avr/modules/lcd2/gui2/base/rootwindow.asm
+++ b/avr/modules/lcd2/gui2/base/rootwindow.asm
@@ -70,6 +70,21 @@ RootWindow_Init:
   clr r16
   ldi r17, (ROOTWINDOW_SIZE-ROOTWINDOW_OFFS_BEGIN)
   bigcall Utils_FillSram                           ; (r17, X)
+
+  ; set pos and size of widget to display size
+  clr r16
+  std Y+WIDGET_OFFS_X_LO, r16
+  std Y+WIDGET_OFFS_X_HI, r16
+  std Y+WIDGET_OFFS_Y_LO, r16
+  std Y+WIDGET_OFFS_Y_HI, r16
+  ldi r16, LOW(DISPLAY_WIDTH)
+  std Y+WIDGET_OFFS_WIDTH_LO, r16
+  ldi r16, HIGH(DISPLAY_WIDTH)
+  std Y+WIDGET_OFFS_WIDTH_HI, r16
+  ldi r16, LOW(DISPLAY_HEIGHT)
+  std Y+WIDGET_OFFS_HEIGHT_LO, r16
+  ldi r16, HIGH(DISPLAY_HEIGHT)
+  std Y+WIDGET_OFFS_HEIGHT_HI, r16
   
   ; set default signal map
   ldi r16, LOW(RootWindow_DefaultSignalmap*2)
@@ -120,6 +135,53 @@ RootWindow_SetApp:
 
 
 
+; ***************************************************************************
+; signal handlers
+
+
+; ---------------------------------------------------------------------------
+; @routine RootWindow_OnLayout
+;
+; @param Y pointer to widget
+; @clobbers any, !Y
+
+RootWindow_OnLayout:
+  ldd r20, Y+WIDGET_OFFS_WIDTH_LO
+  ldd r21, Y+WIDGET_OFFS_WIDTH_HI
+  ldd r22, Y+WIDGET_OFFS_HEIGHT_LO
+  ldd r23, Y+WIDGET_OFFS_HEIGHT_HI
+
+  push yl
+    push yh
+      bigcall OBJ_GetFirstChild
+RootWindow_OnLayout_loop:
+        brcc RootWindow_OnLayout_ret
+        mov yl, r18
+        mov yh, r19
+        ; all children are MainWindow, set to fullscreen
+        std Y+WIDGET_OFFS_WIDTH_LO, r20
+        std Y+WIDGET_OFFS_WIDTH_HI, r21
+        std Y+WIDGET_OFFS_HEIGHT_LO, r22
+        std Y+WIDGET_OFFS_HEIGHT_HI, r23
+        clr r16
+        std Y+WIDGET_OFFS_X_LO, r16
+        std Y+WIDGET_OFFS_X_HI, r16
+        std Y+WIDGET_OFFS_Y_LO, r16
+        std Y+WIDGET_OFFS_Y_HI, r16
+
+        ; force redraw
+        ldd r16, Y+OBJECT_OFFS_FLAGS
+        sbr r16, (1<<WIDGET_FLAGS_DIRTY_BIT) | (1<<WIDGET_FLAGS_LAYOUT_BIT)
+        std Y+OBJECT_OFFS_FLAGS, r16
+
+        rcall OBJ_GetNext
+      rjmp RootWindow_OnLayout_loop
+RootWindow_OnLayout_ret:
+    pop yh
+  pop yl
+  ret
+; @end
+
 
 
 
@@ -129,9 +191,10 @@ RootWindow_SetApp:
 
 RootWindow_DefaultSignalmap:
   ; header
-  .dw MainWindow_DefaultSignalmap  ; next table to use
+  .dw Widget_DefaultSignalmap  ; next table to use
   ; entries
-  ; none for now
+  .db 0,                           WIDGET_SIGNAL_DRAW,     LOW(Widget_OnDrawNop),    HIGH(Widget_OnDrawNop)
+  .db 0,                           WIDGET_SIGNAL_LAYOUT,   LOW(RootWindow_OnLayout), HIGH(RootWindow_OnLayout)
   .db 0, 0, 0, 0  ; end of table
 
 
@@ -146,7 +209,7 @@ RootWindow_DefaultStyle:
   .dw DISPLAY_COLOR_BLACK      ; borderCol_activated
   .dw DISPLAY_COLOR_WHITE      ; shadowCol_activated
   
-  .db 0, 1                     ; outerBorderSize, innerBorderSize
+  .db 0, 0                     ; outerBorderSize, innerBorderSize
   .dw ili9341Font12x16_1*2     ; font
   .db 12, 16                   ; charWidth, charHeight
 
diff --git a/avr/modules/lcd2/gui2/base/vlayout.asm b/avr/modules/lcd2/gui2/base/vlayout.asm
index 92c5f7b..63c8779 100644
--- a/avr/modules/lcd2/gui2/base/vlayout.asm
+++ b/avr/modules/lcd2/gui2/base/vlayout.asm
@@ -91,9 +91,10 @@ VLayout_Init:
 VLayout_OnLayout:
   rcall vLayoutVertically
   rcall vLayoutHorizontalAdjust
-  ; force re-drawing of this widget
+  ; force re-drawing of this widget, clear layout bit
   ldd r16, Y+OBJECT_OFFS_FLAGS
-  ori r16, (1<<WIDGET_FLAGS_DIRTY_BIT)
+  sbr r16, (1<<WIDGET_FLAGS_DIRTY_BIT)
+  cbr r16, (1<<WIDGET_FLAGS_LAYOUT_BIT)
   std Y+OBJECT_OFFS_FLAGS, r16
   sec
   ret