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PoooMukkel: I'm trying to sort the platform icons on the left side but this doesn't seem to be possible, isn't it?

May be I could remove platforms and add them in that ranking I want to have in the left side. But I don't want to remove all of my added platforms... :(

May be GOG can add this possibility in the near future?
We'll add drag and drop support there. You can also remove and add bookmarks as you wish, with any library filters chosen, without disconnecting any integration.