I am trying to construct a toolbar button to go to the beginning of the command line and insert the word trace and then runs the command. (Trace is an alias for a script that figures out the type of the command and calls the appropriate degugger; currently knows how to do TCC and Perl). Nothing simpler, just use Home "trace " Enter with the button set to Send to current tab. And this works if the keyboard is in insert mode but fails if it is in overstrike mode. As far as I've been able to find there is no key that will place the keyboard into insert mode (Ins toggles so it does not work). Am I missing something?