Library /sys$common/syshlp/edthelp.hlb CHANGE, SUBCOMMANDS, TGSEL  *Conan The Librarian (sorry for the slow response - running on an old VAX)

 The TGSEL command allows you to toggle select.  When the select range is
 active, TGSEL will cancel it, and when no select range is active, TGSEL
 will enable it, acting like the SEL command.

 Format: TGSEL