diff --git a/lib/cyberarm_engine/common.rb b/lib/cyberarm_engine/common.rb
index ef1dc0b..eceabd8 100644
--- a/lib/cyberarm_engine/common.rb
+++ b/lib/cyberarm_engine/common.rb
@@ -1,4 +1,6 @@
 module CyberarmEngine
+  GUI_DEBUG = false
+
   module Common
     ImageBlob = Data.define(:to_blob, :columns, :rows)
 
diff --git a/lib/cyberarm_engine/ui/element.rb b/lib/cyberarm_engine/ui/element.rb
index eb53efd..fc9664a 100644
--- a/lib/cyberarm_engine/ui/element.rb
+++ b/lib/cyberarm_engine/ui/element.rb
@@ -18,7 +18,7 @@ module CyberarmEngine
       @visible = !@options.key?(:visible) ? true  : @options[:visible]
       @tip     = @options[:tip] || ""
 
-      @debug = @options[:debug] || CyberarmEngine.const_defined?("GUI_DEBUG") && CyberarmEngine::GUI_DEBUG || false
+      @debug = @options[:debug].nil? ? nil : @options[:debug]
       @debug_color = @options[:debug_color].nil? ? Gosu::Color::RED : @options[:debug_color]
 
       @style = Style.new(options)
@@ -36,7 +36,7 @@ module CyberarmEngine
       @width  = 0
       @height = 0
 
-      @style.width  = default(:width)  || nil
+      @style.width  = default(:width) || nil
       @style.height = default(:height) || nil
 
       @background_canvas = nil # Background.new
@@ -340,7 +340,7 @@ module CyberarmEngine
     end
 
     def debug_draw
-      return unless @debug # allow elements to opt out of debug drawing, makes debugging some things easier.
+      return if @debug == false || !CyberarmEngine::GUI_DEBUG # allow elements to opt out of debug drawing, makes debugging some things easier.
       return if CyberarmEngine.const_defined?("GUI_DEBUG_ONLY_ELEMENT") && self.class == GUI_DEBUG_ONLY_ELEMENT
 
       Gosu.draw_line(
@@ -394,7 +394,7 @@ module CyberarmEngine
 
     def width
       if visible?
-        inner_width + @width
+        inner_width + content_width
       else
         0
       end
@@ -418,7 +418,7 @@ module CyberarmEngine
 
     def height
       if visible?
-        inner_height + @height
+        inner_height + content_height
       else
         0
       end
@@ -488,6 +488,8 @@ module CyberarmEngine
 
       new_size = if size.is_a?(Float) && size.between?(0.0, 1.0)
                    (@parent.send(:"content_#{dimension}") * size).floor - send(:"noncontent_#{dimension}").floor
+                elsif size.is_a?(Numeric)
+                   (size - send(:"noncontent_#{dimension}")).floor
                  else
                    size
                  end
diff --git a/lib/cyberarm_engine/ui/elements/container.rb b/lib/cyberarm_engine/ui/elements/container.rb
index 034c99f..9f93597 100644
--- a/lib/cyberarm_engine/ui/elements/container.rb
+++ b/lib/cyberarm_engine/ui/elements/container.rb
@@ -88,17 +88,20 @@ module CyberarmEngine
 
           Gosu.translate(@scroll_position.x, @scroll_position.y) do
             @children.each(&:draw)
+
+            @children.each do |child|
+              next unless child.visible?
+
+              child.debug_draw
+            end
           end
         end
 
-        @children.each(&:debug_draw)
         debug_draw
       end
 
       def debug_draw
         super
-
-        @children.each(&:debug_draw)
       end
 
       def update
diff --git a/lib/cyberarm_engine/ui/gui_state.rb b/lib/cyberarm_engine/ui/gui_state.rb
index c02a9f8..17ce0d1 100644
--- a/lib/cyberarm_engine/ui/gui_state.rb
+++ b/lib/cyberarm_engine/ui/gui_state.rb
@@ -239,6 +239,9 @@ module CyberarmEngine
         redirect_mouse_button(:right)
       when Gosu::KB_F5
         request_recalculate
+      when Gosu::KB_F12
+        CyberarmEngine.const_set(:GUI_DEBUG, !CyberarmEngine::GUI_DEBUG)
+        request_repaint
       end
 
       @focus.button_down(id) if @focus.respond_to?(:button_down)