diff --git a/avr/devices/c03/test/main.asm b/avr/devices/c03/test/main.asm
index 1bebfbf..c467e5a 100644
--- a/avr/devices/c03/test/main.asm
+++ b/avr/devices/c03/test/main.asm
@@ -253,49 +253,41 @@ test:
   sts guiApp, yl
   sts guiApp+1, yh
 
-  bigcall GuiApp_GetRootWindow
-  brcc DEBUG_STOP
   push yl
     push yh
-      mov xl, r18
-      mov xh, r19
-      ldi r16, 0                                                                                           ; OPTS
-      ldi r17, (WIDGET_PACK_FILLED<<WIDGET_PACK_HSELF0_BIT) | (WIDGET_PACK_FILLED<<WIDGET_PACK_VSELF0_BIT) ; PACK
-      ldi r20, LOW(RESSSOURCE_TXT_LIVINGROOM)
-      ldi r21, HIGH(RESSSOURCE_TXT_LIVINGROOM)
-      bigcall MainWindow_new
-      bigcall MainWindow_GetContentWidget
-      brcc DEBUG_STOP
-      mov xl, yl   ; X=MainWindow
+      bigcall ClimateWin_new
+;      rcall mkTestWindow
+      mov xl, yl
       mov xh, yh
-      push xl      ; mainWindow
-        push xh
-          mov xl, r18  ; contentWindow
-          mov xh, r19
-
-          push xl
-             push xh
-              ldi r16, (1<<OBJECT_OPTS_TIMER_BIT) | (1<<WIDGET_OPTS_INPUT_BIT) | (1<<WIDGET_OPTS_BORDER_BIT)      ; OPTS
-              ldi r17, (WIDGET_PACK_BEGIN<<WIDGET_PACK_HSELF0_BIT) | (WIDGET_PACK_BEGIN<<WIDGET_PACK_VSELF0_BIT) ; PACK
-              ldi r20, VALUE_ID_SENSOR_CO2_BASE
-              ldi r21, C03_EEID_SENSOR_CO2
-              ldi r22, SENSORWATCH_TYPE_CO2
-              bigcall SensorWatch_new
-            pop xh
-          pop xl
-
-        pop xh
-      pop xl
     pop yh
   pop yl
-  brcc DEBUG_STOP
+  brcc DEBUG_STOP2
 
-  bigcall GuiApp_EnterWindow
+  push xl
+    push xh
+      bigcall GuiApp_EnterWindow
+    pop xh
+  pop xl
   brcc DEBUG_STOP3
 
+  push yl
+    push yh
+      mov yl, xl
+      mov yh, xh
+      ldi r16, (1<<WIDGET_FLAGS_VISIBLE_BIT) | (1<<WIDGET_FLAGS_DIRTY_BIT) | (1<<WIDGET_FLAGS_LAYOUT_BIT)
+      bigcall OBJ_AddFlagsUp
+    pop yh
+  pop yl
+
   ret
 
 
+;  ; debug
+;  ldi r16, LOW(Debug_Style*2)
+;  std Y+WIDGET_OFFS_STYLE_LO, r16
+;  ldi r16, HIGH(Debug_Style*2)
+;  std Y+WIDGET_OFFS_STYLE_HI, r16
+
 
 DEBUG_STOP:
   bigjmp DEBUG1
@@ -309,6 +301,122 @@ DEBUG_STOP3:
 
 
 
+mkTestWindow:
+  bigcall GuiApp_GetRootWindow
+  brcc mkTestWindow_ret
+  mov xl, r18  ; use root window as parent for main window
+  mov xh, r19
+  ldi r16, 0                                                                                           ; OPTS
+  ldi r17, (WIDGET_PACK_FILLED<<WIDGET_PACK_HSELF0_BIT) | (WIDGET_PACK_FILLED<<WIDGET_PACK_VSELF0_BIT) ; PACK
+  ldi r20, LOW(RESSSOURCE_TXT_LIVINGROOM) ; TODO: use "Room Climate"
+  ldi r21, HIGH(RESSSOURCE_TXT_LIVINGROOM)
+  bigcall MainWindow_new
+  brcc mkTestWindow_ret
+  
+  ; Y=MainWindow
+  push yl
+    push yh
+      bigcall MainWindow_GetContentWidget  ; r19:r18=content window
+      brcc mkTestWindow_popRet
+      mov xl, r18                          ; use content window as parent
+      mov xh, r19
+    
+      push xl                              ; content window
+        push xh
+          rcall mkTestWidgets
+;          rcall mkSimpleTestWidgets
+        pop xh
+      pop xl
+mkTestWindow_popRet:
+    pop yh
+  pop yl  
+mkTestWindow_ret:
+  ret
+; @end
+
+
+
+; ---------------------------------------------------------------------------
+; @routine mkTestWidgets
+;
+; @param X pointer to MainWindow content window (becomes parent)
+; @return CFLAG set of okay, cleared otherwise
+; @return Y address of newly created object
+
+mkTestWidgets:
+  ldi r16, 0                                                                                           ; OPTS
+  ldi r17, (WIDGET_PACK_FILLED<<WIDGET_PACK_HSELF0_BIT) | (WIDGET_PACK_FILLED<<WIDGET_PACK_VSELF0_BIT) ; PACK
+;  ldi r20, HLAYOUT_MODE_SPREAD
+  ldi r20, VLAYOUT_MODE_EXPAND
+  bigcall VLayout_new
+  brcc mkTestWidgets_ret
+  
+  push yl
+    push yh
+      mov xl, yl                          ; use HLayout as parent
+      mov xh, yh
+    
+      push xl    ; HLayout
+        push xh
+          ldi r16, 0
+          ldi r17, (WIDGET_PACK_BEGIN<<WIDGET_PACK_HSELF0_BIT) | (WIDGET_PACK_BEGIN<<WIDGET_PACK_VSELF0_BIT) ; PACK
+          ldi r20, LOW(RESSSOURCE_IMG_HUMIDITY96)
+          ldi r21, HIGH(RESSSOURCE_IMG_HUMIDITY96)
+          bigcall ImageView_new
+        pop xh
+      pop xl
+      brcc mkTestWidgets_popRet
+
+      push xl    ; HLayout
+        push xh
+          ldi r16, 0
+          ldi r17, (WIDGET_PACK_BEGIN<<WIDGET_PACK_HSELF0_BIT) | (WIDGET_PACK_BEGIN<<WIDGET_PACK_VSELF0_BIT) ; PACK
+          ldi r20, LOW(RESSSOURCE_IMG_CLOUD96)
+          ldi r21, HIGH(RESSSOURCE_IMG_CLOUD96)
+          bigcall ImageView_new
+        pop xh
+      pop xl
+      brcc mkTestWidgets_popRet
+
+mkTestWidgets_popRet:
+    pop yh
+  pop yl  
+mkTestWidgets_ret:
+  ret
+; @end
+
+
+
+mkSimpleTestWidgets:
+  push xl    ; Contentwindow
+    push xh
+      ldi r16, 0
+      ldi r17, (WIDGET_PACK_BEGIN<<WIDGET_PACK_HSELF0_BIT) | (WIDGET_PACK_BEGIN<<WIDGET_PACK_VSELF0_BIT) ; PACK
+      ldi r20, LOW(RESSSOURCE_IMG_HUMIDITY96)
+      ldi r21, HIGH(RESSSOURCE_IMG_HUMIDITY96)
+      bigcall ImageView_new
+    pop xh
+  pop xl
+  brcc mkSimpleTestWidgets_ret
+
+  push xl    ; HLayout
+    push xh
+      ldi r16, 0
+      ldi r17, (WIDGET_PACK_BEGIN<<WIDGET_PACK_HSELF0_BIT) | (WIDGET_PACK_BEGIN<<WIDGET_PACK_VSELF0_BIT) ; PACK
+      ldi r20, LOW(RESSSOURCE_IMG_CLOUD96)
+      ldi r21, HIGH(RESSSOURCE_IMG_CLOUD96)
+      bigcall ImageView_new
+    pop xh
+  pop xl
+  brcc mkSimpleTestWidgets_ret
+
+mkSimpleTestWidgets_ret:
+  ret
+; @end
+
+
+
+
 ; ***************************************************************************
 ; includes
 
@@ -355,9 +463,9 @@ GUI2_MODULE_BEGIN:
 .include "modules/lcd2/gui2/base/valuelabel.asm"
 .include "modules/lcd2/gui2/aqhome/sensorwatch.asm"
 GUI2_MODULE_END:
-
 .equ MODULE_SIZE_GUI2 = GUI2_MODULE_END-GUI2_MODULE_BEGIN
 
+.include "w_climate.asm"
 
 
 .include "ressources.inc"
diff --git a/avr/devices/c03/test/w_climate.asm b/avr/devices/c03/test/w_climate.asm
new file mode 100644
index 0000000..1fa113d
--- /dev/null
+++ b/avr/devices/c03/test/w_climate.asm
@@ -0,0 +1,167 @@
+; ***************************************************************************
+; copyright   : (C) 2026 by Martin Preuss
+; email       : martin@libchipcard.de
+;
+; ***************************************************************************
+; * This file is part of the project "AqHome".                              *
+; * Please see toplevel file COPYING of that project for license details.   *
+; ***************************************************************************
+
+#ifndef AQH_AVR_W_CLIMATE_ASM
+#define AQH_AVR_W_CLIMATE_ASM
+
+
+; ***************************************************************************
+; defines
+
+.equ CLIMATEWIN_OFFS_BEGIN   = MAINWINDOW_SIZE
+.equ CLIMATEWIN_SIZE         = CLIMATEWIN_OFFS_BEGIN+0
+
+
+
+; ***************************************************************************
+; code
+
+.cseg
+
+
+
+; ---------------------------------------------------------------------------
+; @routine ClimateWin_new @global
+;
+; @param Y pointer to GUIAPP
+; @return CFLAG set of okay, cleared otherwise
+; @return Y address of newly created object
+
+ClimateWin_new:
+  bigcall GuiApp_GetRootWindow
+  brcc ClimateWin_new_ret
+  mov xl, r18  ; use root window as parent for main window
+  mov xh, r19
+  ldi r16, 0                                                                                           ; OPTS
+  ldi r17, (WIDGET_PACK_FILLED<<WIDGET_PACK_HSELF0_BIT) | (WIDGET_PACK_FILLED<<WIDGET_PACK_VSELF0_BIT) ; PACK
+  ldi r20, LOW(RESSSOURCE_TXT_LIVINGROOM) ; TODO: use "Room Climate"
+  ldi r21, HIGH(RESSSOURCE_TXT_LIVINGROOM)
+  bigcall MainWindow_new
+  brcc ClimateWin_new_ret
+  
+  ; Y=MainWindow
+  push yl
+    push yh
+      bigcall MainWindow_GetContentWidget  ; r19:r18=content window
+      brcc ClimateWin_new_popRet
+      mov xl, r18                          ; use content window as parent
+      mov xh, r19
+    
+      push xl                              ; content window
+        push xh
+          rcall climateWinCreateSensorWatches
+        pop xh
+      pop xl
+;      brcc ClimateWin_new_popRet
+
+      ; TODO: create menu bar below
+
+ClimateWin_new_popRet:
+    pop yh
+  pop yl  
+ClimateWin_new_ret:
+  ret
+; @end
+
+
+
+; ---------------------------------------------------------------------------
+; @routine climateWinCreateSensorWatches
+;
+; @param X pointer to MainWindow content window (becomes parent)
+; @return CFLAG set of okay, cleared otherwise
+; @return Y address of newly created object
+
+climateWinCreateSensorWatches:
+  ldi r16, 0                                                                                           ; OPTS
+  ldi r17, (WIDGET_PACK_FILLED<<WIDGET_PACK_HSELF0_BIT) | (WIDGET_PACK_FILLED<<WIDGET_PACK_VSELF0_BIT) ; PACK
+;  ldi r20, HLAYOUT_MODE_SPREAD
+  ldi r20, HLAYOUT_MODE_EXPAND
+  bigcall HLayout_new
+  brcc climateWinCreateSensorWatches_ret
+  
+  mov xl, yl                          ; use HLayout as parent
+  mov xh, yh
+
+  push xl    ; HLayout
+    push xh
+      ldi r16, 0
+      ldi r17, (WIDGET_PACK_BEGIN<<WIDGET_PACK_HSELF0_BIT) | (WIDGET_PACK_BEGIN<<WIDGET_PACK_VSELF0_BIT) ; PACK
+      ldi r20, LOW(RESSSOURCE_IMG_HUMIDITY96)
+      ldi r21, HIGH(RESSSOURCE_IMG_HUMIDITY96)
+      bigcall ImageView_new
+    pop xh
+  pop xl
+
+  ; CO2 sensor watch
+  push xl    ; HLayout
+    push xh
+      ldi r16, (1<<OBJECT_OPTS_TIMER_BIT) | (1<<WIDGET_OPTS_INPUT_BIT)     ; OPTS
+      ldi r17, (WIDGET_PACK_BEGIN<<WIDGET_PACK_HSELF0_BIT) | (WIDGET_PACK_BEGIN<<WIDGET_PACK_VSELF0_BIT) ; PACK
+      ldi r20, VALUE_ID_SENSOR_CO2_BASE
+      ldi r21, C03_EEID_SENSOR_CO2
+      ldi r22, SENSORWATCH_TYPE_CO2
+      bigcall SensorWatch_new
+    pop xh
+  pop xl
+  brcc climateWinCreateSensorWatches_ret
+
+  ; temp sensor watch
+  push xl    ; HLayout
+    push xh
+      ldi r16, (1<<OBJECT_OPTS_TIMER_BIT) | (1<<WIDGET_OPTS_INPUT_BIT)                                   ; OPTS
+      ldi r17, (WIDGET_PACK_BEGIN<<WIDGET_PACK_HSELF0_BIT) | (WIDGET_PACK_BEGIN<<WIDGET_PACK_VSELF0_BIT) ; PACK
+      ldi r20, VALUE_ID_SENSOR_TEMP_BASE
+      ldi r21, C03_EEID_SENSOR_TEMP
+      ldi r22, SENSORWATCH_TYPE_TEMP
+      bigcall SensorWatch_new
+    pop xh
+  pop xl
+  brcc climateWinCreateSensorWatches_ret
+
+#if 0
+  ; humidity sensor watch
+  push xl    ; HLayout
+    push xh
+      ldi r16, (1<<OBJECT_OPTS_TIMER_BIT) | (1<<WIDGET_OPTS_INPUT_BIT) | (1<<WIDGET_OPTS_BORDER_BIT)     ; OPTS
+      ldi r17, (WIDGET_PACK_BEGIN<<WIDGET_PACK_HSELF0_BIT) | (WIDGET_PACK_BEGIN<<WIDGET_PACK_VSELF0_BIT) ; PACK
+      ldi r20, VALUE_ID_SENSOR_HUM_BASE
+      ldi r21, C03_EEID_SENSOR_HUM
+      ldi r22, SENSORWATCH_TYPE_HUM
+      bigcall SensorWatch_new
+    pop xh
+  pop xl
+#endif
+
+climateWinCreateSensorWatches_ret:
+  ret
+; @end
+
+
+#if 0
+Debug_Style:
+  .dw DISPLAY_COLOR_BLACK      ; frontCol_norm
+;  .dw DISPLAY_COLOR_LIGHTGREY  ; backCol_norm
+  .dw DISPLAY_COLOR_GREEN      ; backCol_norm
+  .dw DISPLAY_COLOR_BLACK      ; borderCol_norm
+  .dw DISPLAY_COLOR_WHITE      ; shadowCol_norm
+  
+  .dw DISPLAY_COLOR_WHITE      ; frontCol_activated
+  .dw DISPLAY_COLOR_NAVY       ; backCol_activated
+  .dw DISPLAY_COLOR_BLACK      ; borderCol_activated
+  .dw DISPLAY_COLOR_WHITE      ; shadowCol_activated
+  
+  .db 1, 1                     ; outerBorderSize, innerBorderSize
+  .dw ili9341Font12x16_1*2     ; font
+  .db 12, 16                   ; charWidth, charHeight
+# endif
+
+
+#endif
+
diff --git a/avr/modules/lcd2/gui2/aqhome/sensorwatch.asm b/avr/modules/lcd2/gui2/aqhome/sensorwatch.asm
index bda372d..263cf69 100644
--- a/avr/modules/lcd2/gui2/aqhome/sensorwatch.asm
+++ b/avr/modules/lcd2/gui2/aqhome/sensorwatch.asm
@@ -106,6 +106,7 @@ SensorWatch_Init:
     push r21
       push r22
         ; call base class
+        ldi r20, VLAYOUT_MODE_EXPAND
         bigcall VLayout_Init
       pop r22
     pop r21
@@ -309,7 +310,8 @@ SensorWatch_Descriptors:
   .dw RESSSOURCE_TXT_UNKNOWN_S,  RESSSOURCE_IMG_CLOUD96,     0                   ; unknown
   .dw RESSSOURCE_TXT_CO2_S,      RESSSOURCE_IMG_CLOUD96,     0                   ; co2
   .dw RESSSOURCE_TXT_TEMP_S,     RESSSOURCE_IMG_TEMP96,      2                   ; temp
-  .dw RESSSOURCE_TXT_HUM_S,      RESSSOURCE_IMG_HUMIDITY96,  0                   ; hum
+;  .dw RESSSOURCE_TXT_HUM_S,      RESSSOURCE_IMG_HUMIDITY96,  0                   ; hum
+  .dw RESSSOURCE_TXT_TEMP_S,      RESSSOURCE_IMG_HUMIDITY96,  0                   ; hum
 
 
 #endif
diff --git a/avr/modules/lcd2/gui2/base/guiapp.asm b/avr/modules/lcd2/gui2/base/guiapp.asm
index efb2433..98a2190 100644
--- a/avr/modules/lcd2/gui2/base/guiapp.asm
+++ b/avr/modules/lcd2/gui2/base/guiapp.asm
@@ -614,6 +614,7 @@ guiAppCheckSendGuiEvents:
           clr r17
           ldi r20, (1<<WIDGET_FLAGS_VISIBLE_BIT) | (1<<WIDGET_FLAGS_DIRTY_BIT)
           bigcall OBJ_TreeHandleSignalIfFlagsSet  ; (any, !Y)
+
         pop yh
       pop yl  
       ldi r16, GUIAPP_GUITIMER
diff --git a/avr/modules/lcd2/gui2/base/hlayout.asm b/avr/modules/lcd2/gui2/base/hlayout.asm
index 4fdfd22..34672d8 100644
--- a/avr/modules/lcd2/gui2/base/hlayout.asm
+++ b/avr/modules/lcd2/gui2/base/hlayout.asm
@@ -42,12 +42,15 @@
 ; @param X parent widget
 ; @param r16 value for OBJECT_OFFS_OPTS
 ; @param r17 value for WIDGET_OFFS_PACK
+; @param r20 layout mode (HLAYOUT_MODE_EXPAND, HLAYOUT_MODE_SPREAD)
 ; @clobbers any
 
 HLayout_new:
-  ldi r24, LOW(HLAYOUT_SIZE)
-  ldi r25, HIGH(HLAYOUT_SIZE)
-  bigcall Object_Alloc         ; (!r16, !r17, !X)
+  push r20
+    ldi r24, LOW(HLAYOUT_SIZE)
+    ldi r25, HIGH(HLAYOUT_SIZE)
+    bigcall Object_Alloc         ; (!r16, !r17, !X)
+  pop r20
   brcc HLayout_new_ret
   rcall HLayout_Init               ; (r16, r17, X)
   sec
@@ -64,16 +67,18 @@ HLayout_new_ret:
 ; @param X parent widget (if any)
 ; @param r16 value for OBJECT_OFFS_OPTS
 ; @param r17 value for WIDGET_OFFS_PACK
+; @param r20 layout mode (HLAYOUT_MODE_EXPAND, HLAYOUT_MODE_SPREAD)
 ; @clobbers r16, r17, X
 
 HLayout_Init:
   push r20
-    push r21
-      ; call base class
-      bigcall Widget_Init             ; (r16, r17, X)
-    pop r21
+    ; call base class
+    bigcall Widget_Init             ; (r16, r17, X)
   pop r20
 
+  ; set widget-specific data
+  std Y+HLAYOUT_OFFS_MODE, r20
+
   ; set default signal map
   ldi r16, LOW(HLayout_DefaultSignalmap*2)
   std Y+OBJECT_OFFS_SIGNALMAP_LO, r16
@@ -94,6 +99,7 @@ HLayout_Init:
 HLayout_OnLayout:
   rcall hLayoutHorizontally
   rcall hLayoutVertically
+
   ; force re-drawing of this widget, clear layout bit
   ldd r16, Y+OBJECT_OFFS_FLAGS
   sbr r16, (1<<WIDGET_FLAGS_DIRTY_BIT)
@@ -214,7 +220,8 @@ hLayoutVertically:
   ldd zh, Y+WIDGET_OFFS_STYLE_HI
   adiw zh:zl, WIDGET_STYLE_OFFS_OUTERBORDERSIZE
   lpm r18, Z+
-  lpm r19, Z
+;  lpm r19, Z
+  clr r19
   sub r22, r18
   sbc r23, r19
   sub r22, r18
@@ -356,13 +363,19 @@ hLayoutPrepareSpread:
 
   ldd r18, Y+WIDGET_OFFS_WIDTH_LO
   ldd r19, Y+WIDGET_OFFS_WIDTH_HI
-  sub r18, r20
-  sbc r19, r21                                                       
+  sub r18, r20                                            ; width-usedWidth
+  sbc r19, r21
+  brcc hLayoutPrepareSpread_calcAdd
+  clr r20
+  clr r21
+  rjmp hLayoutPrepareSpread_finish
+
+hLayoutPrepareSpread_calcAdd:
   mov r20, r18
   mov r21, r19                                            ; remaining space
   
   rcall LayoutCountVisibleChildren                        ; r16=number of visible child widgets (r17, r18, r19)
-  inc r16
+  inc r16                                                 ; r16=number of spacings (begin->between->end)
   mov r22, r16
   push r22
     ldi r22, (1<<WIDGET_PACK_HSELF1_BIT) | \
@@ -370,12 +383,13 @@ hLayoutPrepareSpread:
     ldi r23, (WIDGET_PACK_FILLED<<WIDGET_PACK_HSELF0_BIT) ; value
     rcall LayoutCountChildrenWithPackMode                 ; r16=number of expandable children (r17, r18, r19)
   pop r22
-  add r22, r16
+  add r22, r16                                            ; r22=number of items to spread
   clr r23
   bigcall Utils_Divu16_16_16                              ; r17:r16=space per element
-  mov r20, r18
-  mov r21, r19                                            ; r21:20=additional space per element
+  mov r20, r16
+  mov r21, r17                                            ; r21:20=additional space per element
 
+hLayoutPrepareSpread_finish:
   ; get and adjust spacing, setup start pos
   ldd zl, Y+WIDGET_OFFS_STYLE_LO
   ldd zh, Y+WIDGET_OFFS_STYLE_HI
diff --git a/avr/modules/lcd2/gui2/base/layout.asm b/avr/modules/lcd2/gui2/base/layout.asm
index b3753ca..d0073ca 100644
--- a/avr/modules/lcd2/gui2/base/layout.asm
+++ b/avr/modules/lcd2/gui2/base/layout.asm
@@ -98,7 +98,7 @@ Layout_SetDefaultHeights_ret:
 ; Ignores invisible widgets.
 ;
 ; @param Y pointer to widget
-; @return r19:r18 total width of all child widgets plus space between
+; @return r19:r18 total size of all child widgets plus space between
 ; @clobbers r16, r17, r18, r19, r20, r21, r22, r23, Z
 
 Layout_SumTmpValues:
@@ -119,7 +119,7 @@ Layout_SumTmpValues:
   push yl
     push yh
       bigcall OBJ_GetFirstChild
-      brcc Layout_SumTmpValues_loopEnd
+      brcc Layout_SumTmpValues_finish
 Layout_SumTmpValues_loop:
         mov yl, r18
         mov yh, r19
@@ -139,10 +139,11 @@ Layout_SumTmpValues_next:
 Layout_SumTmpValues_loopEnd:
     mov r16, r20
     or r16, r21
-    breq Layout_SumTmpValues_done
+    breq Layout_SumTmpValues_finish
     sub r20, r22   ; sub last spacing
     sbc r21, r22
     add r21, r22
+Layout_SumTmpValues_finish:
     add r20, r23   ; add outer border (begin)
     adc r21, r23
     sub r21, r23
@@ -251,8 +252,8 @@ LayoutCountVisibleChildren:
   push yl
     push yh
       bigcall OBJ_GetFirstChild
+      brcc LayoutCountVisibleChildren_done
 LayoutCountVisibleChildren_loop:
-        brcc LayoutCountVisibleChildren_done
         mov yl, r18
         mov yh, r19
         ldd r17, Y+OBJECT_OFFS_FLAGS
@@ -260,7 +261,7 @@ LayoutCountVisibleChildren_loop:
           inc r16
 LayoutCountVisibleChildren_next:
         rcall OBJ_GetNext
-      rjmp LayoutCountVisibleChildren_loop
+      brcs LayoutCountVisibleChildren_loop
 LayoutCountVisibleChildren_done:
     pop yh
   pop yl
diff --git a/avr/modules/lcd2/gui2/base/mainwindow.asm b/avr/modules/lcd2/gui2/base/mainwindow.asm
index 57fa72c..1a39f5c 100644
--- a/avr/modules/lcd2/gui2/base/mainwindow.asm
+++ b/avr/modules/lcd2/gui2/base/mainwindow.asm
@@ -69,6 +69,7 @@ MainWindow_Init:
   push r20
     push r21
       ; call base class
+      ldi r20, VLAYOUT_MODE_EXPAND
       bigcall VLayout_Init             ; (r16, r17, X)
     pop r21
   pop r20
@@ -86,6 +87,8 @@ MainWindow_Init:
   ldi r16, HIGH(MainWindow_DefaultStyle*2)
   std Y+WIDGET_OFFS_STYLE_HI, r16
 
+  bigcall Widget_SetFullScreen  ; (R16)
+
   ; create sub widgets
   rcall mainWindowCreateTitleWidget
   rcall mainWindowCreateContentWidget
@@ -202,6 +205,7 @@ mainWindowCreateContentWidget:
       mov xh, yh
       ldi r16, 0                                                                                           ; OPTS
       ldi r17, (WIDGET_PACK_FILLED<<WIDGET_PACK_HSELF0_BIT) | (WIDGET_PACK_FILLED<<WIDGET_PACK_VSELF0_BIT) ; PACK
+      ldi r20, VLAYOUT_MODE_EXPAND
       bigcall VLayout_new
       brcc mainWindowCreateContentWidget_done
       ; set style for title widget
@@ -282,7 +286,7 @@ MainWindow_ContentStyle:
   .dw DISPLAY_COLOR_BLACK      ; borderCol_activated
   .dw DISPLAY_COLOR_WHITE      ; shadowCol_activated
   
-  .db 2, 2                     ; outerBorderSize, innerBorderSize
+  .db 1, 1                     ; outerBorderSize, innerBorderSize
   .dw ili9341Font12x16_1*2     ; font
   .db 12, 16                   ; charWidth, charHeight
 
diff --git a/avr/modules/lcd2/gui2/base/rootwindow.asm b/avr/modules/lcd2/gui2/base/rootwindow.asm
index 6b448d0..1e7f0ef 100644
--- a/avr/modules/lcd2/gui2/base/rootwindow.asm
+++ b/avr/modules/lcd2/gui2/base/rootwindow.asm
@@ -139,7 +139,7 @@ RootWindow_OnLayout_done:
   ldd r17, Y+OBJECT_OFFS_FLAGS
   cbr r17, (1<<WIDGET_FLAGS_LAYOUT_BIT)
   std Y+OBJECT_OFFS_FLAGS, r17
-  sec
+
   sec
   ret
 ; @end
diff --git a/avr/modules/lcd2/gui2/base/vlayout.asm b/avr/modules/lcd2/gui2/base/vlayout.asm
index 52d8c8d..3d9cce4 100644
--- a/avr/modules/lcd2/gui2/base/vlayout.asm
+++ b/avr/modules/lcd2/gui2/base/vlayout.asm
@@ -42,12 +42,15 @@
 ; @param X parent widget
 ; @param r16 value for OBJECT_OFFS_OPTS
 ; @param r17 value for WIDGET_OFFS_PACK
+; @param r20 layout mode (VLAYOUT_MODE_EXPAND, VLAYOUT_MODE_SPREAD)
 ; @clobbers any
 
 VLayout_new:
-  ldi r24, LOW(VLAYOUT_SIZE)
-  ldi r25, HIGH(VLAYOUT_SIZE)
-  bigcall Object_Alloc         ; (!r16, !r17, !X)
+  push r20
+    ldi r24, LOW(VLAYOUT_SIZE)
+    ldi r25, HIGH(VLAYOUT_SIZE)
+    bigcall Object_Alloc         ; (!r16, !r17, !X)
+  pop r20
   brcc VLayout_new_ret
   rcall VLayout_Init               ; (r16, r17, X)
   sec
@@ -64,16 +67,18 @@ VLayout_new_ret:
 ; @param X parent widget (if any)
 ; @param r16 value for OBJECT_OFFS_OPTS
 ; @param r17 value for WIDGET_OFFS_PACK
+; @param r20 layout mode (VLAYOUT_MODE_EXPAND, VLAYOUT_MODE_SPREAD)
 ; @clobbers r16, r17, X
 
 VLayout_Init:
   push r20
-    push r21
-      ; call base class
-      bigcall Widget_Init             ; (r16, r17, X)
-    pop r21
+    ; call base class
+    bigcall Widget_Init             ; (r16, r17, X)
   pop r20
 
+  ; set widget-specific data
+  std Y+VLAYOUT_OFFS_MODE, r20
+
   ; set default signal map
   ldi r16, LOW(VLayout_DefaultSignalmap*2)
   std Y+OBJECT_OFFS_SIGNALMAP_LO, r16
@@ -115,21 +120,7 @@ VLayout_OnLayout:
 VLayout_OnGetDefaultWidth:
   rcall Layout_SetDefaultWidths
   rcall Layout_GetMaxTmp
-
-  ; get outer border
-  ldd zl, Y+WIDGET_OFFS_STYLE_LO
-  ldd zh, Y+WIDGET_OFFS_STYLE_HI
-  adiw zh:zl, WIDGET_STYLE_OFFS_OUTERBORDERSIZE
-  lpm r16, Z
-  clr r17
-  sbiw zh:zl, WIDGET_STYLE_OFFS_OUTERBORDERSIZE
-  
-  add r18, r16  ; add outer border (top)
-  adc r19, r17
-
-  add r18, r16  ; add outer border (bottom)
-  adc r19, r17
-  
+  bigcall Widget_AddOuterStyleBorders   ; (r20, r21)
   sec
   ret
 
@@ -228,7 +219,8 @@ vLayoutHorizontally:
   ldd zh, Y+WIDGET_OFFS_STYLE_HI
   adiw zh:zl, WIDGET_STYLE_OFFS_OUTERBORDERSIZE
   lpm r18, Z+
-  lpm r19, Z
+;  lpm r19, Z
+  clr r19
   sub r22, r18
   sbc r23, r19
   sub r22, r18
@@ -244,14 +236,14 @@ vLayoutHorizontally_loop:
         mov yl, r18
         mov yh, r19
         
-        ldd r12, Y+WIDGET_OFFS_TMP_LO
+        ldd r12, Y+WIDGET_OFFS_TMP_LO             ; default width
         ldd r13, Y+WIDGET_OFFS_TMP_HI
         
         ldd r17, Y+WIDGET_OFFS_PACK
         andi r17, (1<<WIDGET_PACK_HSELF1_BIT) | (1<<WIDGET_PACK_HSELF0_BIT)
         cpi r17, (WIDGET_PACK_FILLED<<WIDGET_PACK_HSELF0_BIT)
         brne vLayoutHorizontally_setWidth
-        mov r12, r22
+        mov r12, r22                              ; TODO: need to check size, subtract borders!!!
         mov r13, r23
 vLayoutHorizontally_setWidth:
         std Y+WIDGET_OFFS_WIDTH_LO, r12
@@ -261,7 +253,7 @@ vLayoutHorizontally_setWidth:
             ldd r17, Y+WIDGET_OFFS_PACK
             mov yl, xl                            ; use parent
             mov yh, xh
-            rcall Widget_PackSelfX                ; R5:R4=new pos (r17, r18, r19, r20, r21)
+            rcall Widget_PackSelfX                ; R5:R4=new pos (r17, r18, r19, r20, r21)   !! TODO: ERROR when FILLED !!
           pop yh
         pop yl  
         std Y+WIDGET_OFFS_X_LO, r4
@@ -372,6 +364,11 @@ vLayoutPrepareSpread:
   ldd r19, Y+WIDGET_OFFS_HEIGHT_HI
   sub r18, r20
   sbc r19, r21                                                       
+  brcc vLayoutPrepareSpread_calcAdd
+  clr r20
+  clr r21
+  rjmp vLayoutPrepareSpread_finish
+vLayoutPrepareSpread_calcAdd:
   mov r20, r18
   mov r21, r19                                            ; remaining space
   
@@ -387,9 +384,10 @@ vLayoutPrepareSpread:
   add r22, r16
   clr r23
   bigcall Utils_Divu16_16_16                              ; r17:r16=space per element
-  mov r20, r18
-  mov r21, r19                                            ; r21:20=additional space per element
+  mov r20, r16
+  mov r21, r17                                            ; r21:20=additional space per element
 
+vLayoutPrepareSpread_finish:
   ; get and adjust spacing, setup start pos
   ldd zl, Y+WIDGET_OFFS_STYLE_LO
   ldd zh, Y+WIDGET_OFFS_STYLE_HI
diff --git a/avr/modules/lcd2/gui2/base/widget.asm b/avr/modules/lcd2/gui2/base/widget.asm
index 30a76c5..b5f83b6 100644
--- a/avr/modules/lcd2/gui2/base/widget.asm
+++ b/avr/modules/lcd2/gui2/base/widget.asm
@@ -523,7 +523,7 @@ Widget_OnDraw:
   sbrs r17, WIDGET_OPTS_BORDER_BIT
     rjmp Widget_OnDraw_ret
   bigcall Widget_DrawBorder
-  
+
 Widget_OnDraw_ret:
   sec
   ret
@@ -719,6 +719,17 @@ Widget_OnTouch_done:
 Widget_Clear:
   rcall Widget_LoadDimsForFullWidget   ; (none)
   rcall Widget_MakeAbsPos             ; (r16, r17, r18, r19)
+  rcall Widget_ValidateDims           ; (r16, r17)
+  tst r16
+  breq Widget_Clear_l1
+  ldi r16, LOW(DISPLAY_COLOR_RED)
+  mov r2, r16
+  ldi r16, HIGH(DISPLAY_COLOR_RED)
+  mov r3, r16
+  bigcall Display_FillRect
+  ret
+Widget_Clear_l1:
+
   rcall Widget_SelectColors           ; (R16)
   mov r2, r0                          ; use background
   mov r3, r1
@@ -927,6 +938,109 @@ Widget_MakeAbsPos_loopEnd:
 
 
 
+; ---------------------------------------------------------------------------
+; @routine Widget_ValidateDims @global
+;
+; @param  Y     address of widget
+; @param r5:r4   X0
+; @param r7:r6   Y0
+; @param r9:r8   X1/W
+; @param r11:r10 Y1/H
+; @return r16    1 if dims modified, 0 if dims where within display range
+; @clobbers r16, r17
+
+Widget_ValidateDims:
+  push r18
+    clr r18
+    ldi r16, LOW(DISPLAY_WIDTH)    ; check X
+    ldi r17, HIGH(DISPLAY_WIDTH)
+    cp r4, r16
+    cpc r5, r17
+    brcs Widget_ValidateDims_width
+    ldi r18, 1
+    clr r4
+    clr r5
+Widget_ValidateDims_width:
+    sub r16, r4                    ; calculate remaining width from pos on
+    sbc r17, r5
+    cp r16, r8
+    cpc r17, r9
+    brcc Widget_ValidateDims_y
+    ldi r18, 1
+    mov r8, r16
+    mov r9, r17
+Widget_ValidateDims_y:
+    ldi r16, LOW(DISPLAY_HEIGHT)    ; check Y
+    ldi r17, HIGH(DISPLAY_HEIGHT)
+    cp r6, r16
+    cpc r7, r17
+    brcs Widget_ValidateDims_height
+    ldi r18, 1
+    clr r6
+    clr r7
+Widget_ValidateDims_height:
+    sub r16, r6                    ; calculate remaining width from pos on
+    sbc r17, r7
+    cp r16, r10
+    cpc r17, r11
+    brcc Widget_ValidateDims_ret
+    ldi r18, 1
+    mov r10, r16
+    mov r11, r17
+Widget_ValidateDims_ret:
+    mov r16, r18
+  pop r18  
+  ret
+; @end
+
+
+
+; ---------------------------------------------------------------------------
+; @routine Widget_CheckDims @global
+;
+; @param  Y     address of widget
+; @clobbers r16, r17, r18, r19
+
+Widget_CheckDims:
+  ldi r18, LOW(DISPLAY_WIDTH)    ; check X
+  ldi r19, HIGH(DISPLAY_WIDTH)
+  ldd r16, Y+WIDGET_OFFS_X_LO
+  ldd r17, Y+WIDGET_OFFS_X_HI
+  cp r16, r18
+  cpc r17, r19
+  brcc Widget_CheckDims_invalid
+  sub r18, r16
+  sbc r19, r17
+  ldd r16, Y+WIDGET_OFFS_WIDTH_LO
+  ldd r17, Y+WIDGET_OFFS_WIDTH_HI
+  cp r18, r16
+  cpc r19, r17
+  brcs Widget_CheckDims_invalid
+
+  ldi r18, LOW(DISPLAY_HEIGHT)    ; check Y
+  ldi r19, HIGH(DISPLAY_HEIGHT)
+  ldd r16, Y+WIDGET_OFFS_Y_LO
+  ldd r17, Y+WIDGET_OFFS_Y_HI
+  cp r16, r18
+  cpc r17, r19
+  brcc Widget_CheckDims_invalid
+  sub r18, r16
+  sbc r19, r17
+  ldd r16, Y+WIDGET_OFFS_HEIGHT_LO
+  ldd r17, Y+WIDGET_OFFS_HEIGHT_HI
+  cp r18, r16
+  cpc r19, r17
+  brcs Widget_CheckDims_invalid
+  ; done, all okay so far
+  sec
+  rjmp Widget_CheckDims_ret
+Widget_CheckDims_invalid:
+  clc
+Widget_CheckDims_ret:
+  ret
+; @end
+
+
 ; ---------------------------------------------------------------------------
 ; @routine Widget_SelectColors @global
 ;