General work planes are created perpendicular to the specified line in any amount of times. The direction of the work plane is determined by the line. One of the orthographic or perspective projection type is selected.
In the Ribbon menu , click the 3P Workplane icon from the View tab Workplane title .
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In the sample screenshot, the whole structure is shown in perspective on the left. On the right, the orthagraphic projection of the workplane taken perpendicular to the pitched roof can be seen.
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