Saving Screen layout, made in ARandR Screen Layout Editor 0.1.6

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http://crunchbang.org – You can save it really easily using the menu inside the editor. Just go to "> Layout > Save as" (or Alt+L) and save the layout. When you plug it into the docking station you only have to use the menu again to open and apply (or use Ctrl+O then Ctrl+Enter) the saved layout. As far as making it so that it automatically switches, someone with more experience may have an idea about that, I never tried it. (HowTos)