@mark-prins -- there is some confusion here caused by the labelling of this: it should actually be "Select / unselect all rows", as this is what the column header does on the actual table.

Also, it doesn't actually make any sense to be able to toggle all columns off.

I've added my suggested functionality to the PR for this: #5475 (review)

Perhaps we should get some further clarification/agreement about what the correct design should be before doing further work on this?

as noted on the PR - the use case for toggling them all off is if I have a lot of columns and just want to display a few. I can toggle all off with one click and show the wanted columns with a few clicks. The alternative is a lot of clicking 'hide'

The first two requirements you've got in the PR would fix my immediate problem:

• name the checkbox column correctly
• don't show that as an option in the column picker

after that I'm not fussed either way: having a show/hide all or a restore option. would be fine to just do the first two bits and close the issue tbh

Tested in V2.5.0-RC3, now there is only one option to show all columns, and hiding is done by manually unticking each one. Build test passed, moving to Done ✅