From FreeCAD Documentation
- Select a sketch.
- There are several ways to invoke the tool:
- If the sketch is attached:
- The Sketch has support dialog opens.
- Press the Yes button to detach the sketch.
- The Choose orientation dialog opens.
- Optionally press the Cancel button to only detach the sketch and finish the tool.
- Specify the plane for the orientation. The plane is relative to the local coordinate system the sketch is in:
- If the Reverse direction checkbox is not checked:
- Top: XY-Plane
- Front: XZ-Plane
- Right: YZ-Plane
- If the Reverse direction checkbox is checked:
- Bottom: XY-Plane
- Rear: XZ-Plane
- Left: YZ-Plane
- Optionally change the Offset. The offset is measured along the Z, Y or X axis of the local coordinate system.
- Press the OK button.