Keynote slide editing, Plus-sign on text box, how to AUTOMATICALLY Resize?, and does it have limits?

I already know that, when editing a text box, if a plus sign (+) appears in the bottom center, then it's warning you that there's more text that you're not seeing, that's fine. And yes, I know how to Cmd-A, resize font, etc. BUT I also seem to recall that you could somehow magic-click or use a hotkey combination that would tell Keynote to automatically resize the text so that you could see it all. I can't seem to find that now, but I'm sure I remember it. I did check and Layout -> Shrink to Fit is already checked/enabled. Questions: - Does anybody remember the hotkey or mouse click that would resize the text automatically, so it was all visible? - Is there maybe some font size limit that the automatic resizing won't go below some value? - Is there some other easy way to edit the text on the slide? I usually do want to reduce the amount of text, but for that I need to temporarily see it all. (beyond Cmd-A functionality) Other Notes: - Using the default "white" template - Keynote version 11.2 on Intel iMac with up-to-date Monterey Please feel free to make other suggestions. Thanks in advance.