This is just a convenient macro to quickly hide some element e.g the subtitle or a button, in the current tiddler. Use it as a quick-fix to hide some tiddler element in a public tiddler or for a print out, etc.
Dang, you right. I thought I had figured out a clever automation trick in that popup but nope. The way to hide “more” would be with <<hide more-tiddler-actions>>. I’ll have to modify the popup.