That would be the tool options dialog. You should be able to open it and then dock it back to where you want it, see https://docs.gimp.org/2.10/en/gimp-stuck-missing-tool- options.html and https://docs.gimp.org/2.10/en/gimp-concepts-docks.html
-- You received this bug notification because you are a member of Ubuntu Desktop Bugs, which is subscribed to gimp in Ubuntu. https://bugs.launchpad.net/bugs/2011729 Title: Rider for tools has disappeared To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gimp/+bug/2011729/+subscriptions -- desktop-bugs mailing list desktop-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/desktop-bugs