What is the "Use border and shadow of selected object" option supposed to do?

In Writer, to add a caption to a table or an object (image, OLE, etc), I right-click on the item I want to caption, and select Insert Caption….

That pops up a dialogue box titled Insert Caption.

In that dialogue box, there is a button marked Options…

Clicking that button pops up another dialogue box titled Caption Options.

In the Caption Options dialogue box, there is a checkbox option called Use border and shadow of selected object.

I searched the web to try to understand what that option is supposed to do. The only hit I got was https://documentation.libreoffice.org/assets/Uploads/Documentation/en/WG7.6/WG76-WriterGuide.pdf . The only place in that document mentioning this option is page 254, which says:

“The Frame Format option Use border and shadow of selected object does not apply to table captions, because a table is not an object enclosed in a frame.”

That isn’t very helpful, because it doesn’t explain:

  1. what the option is supposed to do, nor
  2. why the option is available (not greyed-out) when the user inserts a caption for a table.

In LibreOffice 24.2.7.2 on Ubuntu 24.04.4 LTS, I tried inserting captions with the option checked, and with it unchecked. I did this with tables and with shapes. I saw no difference between the results whether the option was checked or not. Am I missing something?

Does anyone here know the answers to 1 and 2 above?

image

[x] Use border and shadow of selected object.
image

[ ] Use border and shadow of selected object.
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