--- /dev/null
+-a watch attribute setting
+-A watch attribute testing
+-b # background colour
+-B # reverse background colour
+-c # context lines
+-d # display mode (see below)
+-e # emphasis colour [mode 1]
+-f # foreground colour
+-F # reverse foreground colour
+-g # font [mode 5] (see below)
+-h # screen height
+-i ignore runtime errors
+-l # left margin
+-o watch object movement
+-O watch object locating
+-p alter piracy opcode
+-r # right margin
+-s # random number seed value
+-S # transscript width
+-t set Tandy bit
+-T bold typing [modes 2+4+5]
+-u # slots for multiple undo
+-w # screen width
+-x expand abbreviations g/x/z
+-Z # error checking (see below)