By default, each application has it's own "design" folder for css and image files off the root of that application (ie. /scaffolding/design/). If you wanted to override them, you could copy them into your custom theme folder and edit them there. If you want a view to be used across applications (ie. one master view for vanilla, scffolding, etc), you could place it in: /themes/theme_name/views/default.master /themes/theme_name/design/*.png,*.css If you wanted a view to be specific to one application (ie. an altered master view for scaffolding only), you could place it in: /themes/theme_name/app_name/views/default.master /themes/theme_name/app_name/design/*.png,*.css