I am having trouble making smaller pages "fit" the whole screen. Take a look at my screenshot to see the area I am talking about. But basically I either want to know how to edit that area to change the color from white to grey or how I can make the existing background stretch to fit 100% of someones screen height.
Right now the body and html tags end right below that "Release 1.0" and you can see the dark grey I want to stretch down.
You should go to Shared Componentes > Templates and edit the corresponding page tamplate for that. There, you can control the layout. Probably the css file is doing that but you can extend the code manuallay to see what happens.