+\define@key{Gm}{nohead}[true]{\Gm@doifelse{nohead}{#1}%
+ {\Gm@setlength\headheight\z@\Gm@defbylen{ltj@headsep}\z@}{}}%
+\define@key{Gm}{nofoot}[true]{\Gm@doifelse{nofoot}{#1}%
+ {\Gm@defbylen{ltj@footskip}\z@}{}}%
+\define@key{Gm}{noheadfoot}[true]{\Gm@doifelse{noheadfoot}{#1}%
+ {\Gm@setlength\headheight\z@\Gm@defbylen{ltj@headsep}\z@
+ \Gm@defbylen{ltj@footskip}\z@}{}}%