Mouse Buttons
Right button - Drag object
Left button - Create object
Move mouse - Change size
If no object is drawn yet, Right Mouse Button cancels.
Keyboard Keys
< > - Rotate object
PageUp/PageDown - Change width
Home / End - Change height
Ins / Del - Change depth
Space - Toggles angle/size increment
Enter - Done
Esc or C - Cancel/Exit
+ - - Zoom map
Cursors - Move map
NOTE
If Snap-to-Grid is ON, the grid size determines vertex locations! However, if the length of a side is less than the grid size, it is ignored!