What is the gray box in the header or footer area protruding into the document area?

What is the gray box in the header or footer area that extends into the document area and obscures words which happen to be there?

image

Yesterday I noticed something like that in the header area for the first time with this version.

Version: 25.8.0.0.alpha0+ (X86_64) / LibreOffice Community
Build ID: 80c90897657896b94689513119bf05eafc21519b
CPU threads: 8; OS: Linux 6.8; UI render: default; VCL: gtk3
Locale: sv-SE (de_DE.UTF-8); UI: en-US
Calc: threaded

The gray field covered words of the text such that I couldn’t read them. Because I didn’t have time to investigate this further, I simply switched off the headers and did my actual work.

Now I see something like this in the footer area, but only when the cursor is in the footer

What is that? What is it good for?

Gray background usually indicates generated contents (as opposed to manually typed contents).

In your case this looks like Page Number and Page Count fields.

If you don’t like such clues, you can disable them with View>Field Shadings. I am still under 24.8.5.2 and it is possible that the configuration command/menu/dialog has changed in 25.x.

I’d rather recommend you keep the clue enabled as it is a valuable hint about what is really present in your document. It never prints.

Sorry, you misunderstood me. Of course the grey fields for the actual page number and for the total number of pages are automatically generated content. I mean the light grey area which I have boxed here in red above the footer space protruding into the edit area. Some words are obscured by it:

I can’t guess from the screenshot. Attach a reduced sample of a file still exhibiting the issue.

Seems a video glitch with the header/footer pop-up.
imagen
In the meantime this is solved, you can disable the header/footer menu.

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Thank you! Yes, Insert>Header and Footer>Use header/footer menu switches it off:

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