Adding nations to your dossier is easy enough - each nation has a button saying "Add nationname to dossier" on their page. Removing them is a bit trickier though - you have to go to your dossier, tick the boxes of the ones you want to remove, and then click "Remove Marked Nations". My main dossier (which is on another of my nations) has 34 pages - so it takes some time to remove nations, as they'll be spread over several pages.
If I accidently click to add a nation to my dossier (rather than endorsing them), or realise that a certain nation shouldn't be in my dossier, I'd like to be able to press a "Remove nation from dossier" button on the nation's main page.
Its not a major change, or anything urgent, just something that would be quite helpful.



