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
R / Shift+R - Change radius
< > - Change angle
Up/Down Cursor - Change #steps
Left/Right Cursor - Radius swirl
PageUp/PageDown - Change width
Home / End - Change height
Ins / Del - Change depth
Tab/Shift+Tab - Rotate all
Space - Toggles angle/size increment
Enter - Done
Esc or C - Cancel/Exit
+ / - - Zoom Map size
NOTE
If Snap-to-Grid is ON, the grid size determines vertex locations! However, if the length of a step is less than the grid size, it is ignored!
Dashed area is the Bottom of Stair. For stairs inside a Sector Don't make too many Visible Sides!