How can I identify this popup face?

Question

I'm trying to find the face that applies to this tooltip in LSP in rust-mode with rust-analyzer, but I'm not seeing anything when I search on:

tooltip
lsp
popup
posframe
lsp-rust-analyze
faces
lsp-ui

If there's a general method that works to identify faces you can't put the cursor on, or if someone knows what that annoyingly light background face is, I would love the help.

score 1 · Answer 1 · answered Oct 16 '21 at 06:23

1

It seems like this is lsp-ui-doc-background.

answered Oct 16 '21 at 06:23

Ivan Dimitrov Yonchovski

591
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11

That doesn't answer the question, which is **how** to identify. – Drew Oct 16 '21 at 18:35
@Drew I am answering this > or if someone knows what that annoyingly light background face is – Ivan Dimitrov Yonchovski Oct 17 '21 at 12:33
OK. But FWIW, your answer would be even better if you mentioned how you found out what the face is. – Drew Oct 17 '21 at 17:17
Unfortunately nothing by that name comes up in the customization search, and `lsp-ui-doc-background` isn't a face that my copy of Emacs knows of. – Ashley Lake Nov 01 '21 at 16:29

How can I identify this popup face?

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