Help finding commands described in Insights book

[Orome]

At the start of the several "Insights" books, a notation for commands and keystroke sequences is described. In particular, it says there that "calculator commands ... are printed in helvetica [sic!] characters" and "keys are displayed ... surrounded by rectangular boxes" and that there is a special representation for operations "available in the various menus".

Are we meant to assume that if a command is shown in Helvetica, without a box or the special representation, it does not appear in any menu and must be typed in?