Question

I’ve checked my elisp files to make sure that I do not have any bindings that contain Shift+R (and I have not found any). I expect SHIFT+R to print an uppercase character, but instead I get R R undefined inside of the Emacs command line. This is only in C/C++ major modes.

Any suggestions?

Update: Describing the key shows that it is undefined. How would I define it for the normal, expected use (capitalizing the letter R)?

Answer 1

I assume by the ‘expected use’ you mean to insert the ‘R’ character. For this, you’d need to bind the key to ‘self-insert-command’:

M-x global-set-key R self-insert-command

Or, in your .emacs or .emacs.d/init.el file:

(global-set-key "R" 'self-insert-command)

Of course, this should be the default….