Press the Coordinate System button or from the menu choose Geometry->"Add Coordinate System"

Follow the instructions on the input tab: Pick the location Pick a point on the x-axis Pick a point where y>0

This will make a new coordinate system which will now be active. Any drawing will happen on the XY, XZ, YZ planes of this coordinate system. Whichever plane is most facing the camera will be the one that is drawn on.

To use the world coordinate system, either: delete the active coordinate system right-click on the active coordinate system and choose ( "unset coordinate system active" )