We would like to add the SHIFT+F9 (show/hide individual merge code) command and the CTRL+F9 (insert blank field brackets) command to the mailing ribbon. We have already created a custom tab and added the ALT+F9 (show/hide all merge codes). Unfortunately, we cannot find the commands for the other two shortcuts in the command list - possibly because we don't know the proper names for the commands.
How can we add the SHIFT+F9 and CTRL+F9 commands to the ribbon? Thank you for any assistance.