Need help restoring the glyph previews in the overall view

I did something–no idea what!–that caused the glyph previews to disappear in the overall view, so what I have is shown in the attachment.
blank overview.jpg
Yet when I go into the individual glyphs, I see anything I’ve entered, but for glyphs where I haven’t put in any new contours or anything of the sort, the individual glyph comes up blank like the overall view.

I clicked something by accident, I think–but can’t reconstruct it. Help would be much appreciated!

You may have changed the glyph display mode to COLR. Change it back to Auto.
Glyph Display Mode.png