When you said not quite low enough I knew what happened, that there should be more stuff. I *thought* I had screen in full screen mode, but apparently not. When I did I still had to wrangle windows to get anything to happen. Probably years ago I glanced at the ctrl-alt-[letter] hotkeys to turn things on and off, but I *NEVER* used them because I've been using windows hotkeys for 30 years (c = cygwin) and wasn't about to change. I use Timeline very often so I would never be in the habit of turning that on/off anyway The rest of the text commands window was down there, fully opened, but Too Big for my screen! I got screencaps to show those but doesn't matter. Then I gave up and found out how to ctrl-r to reset everything. With that, there's the text entry box. Thanks much!
To answer the original Q, '?' returns a list of available commands, and 'command /?' returns more info.
The specific command that helped me is sketch.showunderconstrained. Perfect.