I'm using Safari on macOS.
For some reason the layers panel is gone.
How do I make it reappear?
In the main menu, under view, you should have the option to toggle which panels are visible. Check that the layers panel is still checked as visible.
Depending on how you've got your window laid out, it could be in the same place as the tilemap bar, just as a separate tab.
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That worked, thanks.