Here you can decide whether you want to have your lists docked, or as floating windows. This is especially useful if you use a second screen.
Floating windows can be grouped together. You can then switch between each list using the tabs at the bottom of the window.
If you have lost a list, you can find it again in the Design tab. Here you will also find the catalogues that can be docked, undocked and grouped.
If you have lost one of your catalogues, or they are not behaving as you would like, you can return them to the default setting from the Program Settings:
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Your Palette CAD Blog Team