edit_grass [increment] - turn on mode for editing grass tiles. increment
sets number value by which to change the grass

history - writes out the family history of the current family. if file is
not specified, the default is used

log_mask [mask] - sets the event logging mask
move_objects - turn on or off allowing the user to move any object

prepare_lot - checks for required objects on the current lot and deletes
come and see me objects

preview_anims - turns on/off animation preview mode
rotation [0|1|2|3] - set absolute world rotation
route_balloons - turn on or off the display of routing debug balloons
sim_log [begin|end] - start and stop the sim logging
xyzzy - say "xyzzy"