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I have a button set up to type "Confidentiality, Non-Disclosure, Non-Solicitation Agreement" what switches do I add to have that line show as Confidentiality, Non-Disclosure, Non-Solicitation Agreement BOLD and UNDERLINE

Control B toggles Bold, so you need one Control B before to turn Bold on and another one after the text to turn it off.

The same works for Underline, Control U.

{Ctrl b}{Ctrl u}Confidentiality, Non-Disclosure, Non-Solicitation Agreement{Ctrl b}{Ctrl u}

Also, Control I works to turn Italic on and off.