Sometimes when I load MECABRICKS the Groups, Properties, and Colors tool panels at the right are missing. Instead, there is a large space where they should be. This is consistent using Chrome, Firefox, and the Brave browsers.

Is there a way to view and hide these tool panels using some hotkey I accidentally hit? I cannot find them in the menu.

My machine could be the issue, of course. It's an ASUS Maximus motherboard running an Intel i9-10900k CPU @ 3.70 GHz, with 64 GB of RAM, and an NVIDIA GeForce RTX 3060 video card with 12 GB using 64 bit Windows 10. But somehow I don't feel that is slowing down MECABRICKS.