The rotated working plane can now be used for drawing an object, such as a staircase, for instance.
After setting an appropriate placing grid - use the ”Grid snap properties“.
Start with the design of a staircase using the command “Place new prism“.
Draw object in the 3D view
Each mouse click on your working plane creates a new point.
After you have defined the last point, terminate with “return” or double click the last point.
To exit the edit mode, press “ESC“.
Note: during the “draw cube with the mouse“ command, you can undo wrong entries with “backspace”.
Enter your input with “return” or double-click the last point.