M-? Display extended command help (if the platform allows this)
M-2 Toggle two-weapon combat (unless number_pad is enabled)
M-a Adjust inventory letters
-M-A Annotate: supply a name for the current dungeon level (if supported)
+M-A Annotate: supply a name for the current dungeon level
M-c Talk to someone
M-C Conduct: list voluntary challenges you have maintained
M-d Dip an object into something
M-m Use a monster's special ability
M-n Name a monster, an individual object, or a type of object
M-o Offer a sacrifice to the gods
-M-O Overview: show a summary of the explored dungeon (if supported)
+M-O Overview: show a summary of the explored dungeon
M-p Pray to the gods for help
M-q Quit
M-r Rub a lamp
-M-R Ride: mount or dismount a saddled steed (if supported)
+M-R Ride: mount or dismount a saddled steed
M-s Sit down
M-t Turn undead
M-T Tip: empty a container