shift+home or shift+end will change to the previous or next glyph in the currently selected glyphs filter. It would be nice if caps lock worked just like holding shift down so I don’t have to keep one finger on shift when I’m cycling through the entire font to review spacing, look for red arrows, etc.
Not sure if it works that way. Caps Lock is a bit more tricky on the Mac. But if you want a single key, you can assign a new one through app preferences:
Can I record a shortcut without holding down one of the modifier keys? I’d like to just assign page up and page down to show previous and show next.