I'm not in full-screen mode, exactly, but I did something that made all the tools and options and whatnot disappear. My workspace is still checkmarked in Windows > Workspace, but all the goodies are hiding. I know I've done this before, but not often enough that I can remember how to fix it!
[Title edited for clarity and future searches by moderator.]
Tap the [Tab] key.
May all your problem-solving today be this easy. Thanks!
See...this happens once a year or so...and thoroughly nons my plus (or would that be "plusses my non"?). But I knew I'd asked it before, and here's the answer oh-so-tidily filed away for me!