This command is a catch all for how miscellaneous things are done by fvwm. Right now this command affects where the move/resize feedback window appears and how window placement is aborted. To have more Mwm- or Win-like behavior you can call Emulate with Mwm or Win as its argument. With Mwm resize and move feedback windows are in the center of the screen, instead of the upper left corner. This also affects how manual placement is aborted. See the ManualPlacement description.