Translucent Sidebar

Lets the page show through the sidebar when it floats over it, with the sidebar hidden, instead of the theme color covering it.

Turn it on

Open Dia → Settings → Patches and switch on Translucent Sidebar. Or run:

diatweaks enable translucentSidebar

FAQ

Can I change the material?

Yes. Turn on Window Material and pick one there. With Window material off, it uses the same material as the window's background.