In tcsh setting autolist will cause tab completion to show a menu of options when the completion choice is ambiguous instead of just beeping at you and waiting for more input until an unambiguous completion is possible. From the tcsh man page:
autolist (+)
If set, possibilities are listed after an ambiguous completion.
If set to `ambiguous', possibilities are listed only when no
new characters are added by completion.
In
tcsh
setting autolist will cause tab completion to show a menu of options when the completion choice is ambiguous instead of just beeping at you and waiting for more input until an unambiguous completion is possible. From the tcsh man page: