Normally, I just process whatever looks good, and keep it good looking if I like the picture I made enough. If it looks good enough for me, then I’m sticking with it.
You’re missing the bottom toolbar, which contains a button to toggle it on/off. I believe you can toggle the bottom toolbar (and filmstrip) by repeatedly pressing Ctrl+Shift+b. You can also toggle the two types of overexposure warnings by pressing “O” (for “clipping indication”) or “Shift+O” (for “raw overexposed indication”)