Automatic Selection of the Sketching Plane
During feature creation, you must select a line entity on the drawing to represent the sketching plane. The sketching plane is automatically selected in the following cases:
• The drawing consists of a single orthographic view.
The default datum plane referencing the orthographic view is automatically used as the sketching plane.
The Through Until depth and the To Selected angle of revolution for extruded and revolved features, respectively, are not valid because there are no other views from which to pick the reference entities for these options.
• The entities that you select to define the section profile are from a sectional or auxiliary view of the drawing.
If a datum plane or surface that the line entity (selected from the sectional or auxiliary view) references does not exist, an offset datum plane is created during feature creation and is automatically used as the sketching plane.