Changing the key signature without changing any notes
New to Musescore.
I've written a score using the wrong key signature. I want to change the key signature ONLY and leave all the notes unchanged. I've been through the transpose section and key change section to no avail. No note needs to change as it appears on the score, only the key signature.
Is this possible?
Don't really want to re-input it all even it was my own mistake,