From FreeCAD Documentation
- To add features:
- Press the Add feature button.
- Select a feature in the Tree view or the 3D view.
- Repeat to add more features.
- To remove features:
- Press the Remove feature button.
- Do one of the following:
- Select a feature in the Tree view or the 3D view.
- Select a feature in the list and press the Del key.
- Right-click a feature in the list and select Remove from the context menu.
- Repeat to remove more features.
- If there are several features in the pattern, their order can be important. See PartDesign PolarPattern.
- Specify the Direction of the pattern:
- Normal sketch axis: The Z axis of the sketch (only available for sketch-based features).
- Vertical sketch axis: The Y axis of the sketch (idem).
- Horizontal sketch axis: The X axis of the sketch (idem).
- Construction line #: A separate entry for each construction line in the sketch (idem).
- Base X axis: The X axis of the Body.
- Base Y axis: The Y axis of the Body.
- Base Z axis: The Z axis of the Body.
- Select reference...: Select a Datum Line in the Tree view or a Datum Line or edge in the 3D view.
- Check the Reverse direction checkbox to reverse the pattern.
- introduced in version 1.0: Specify the length Mode:
- Overall Length: Enter the Length from a given point on the first occurrence to the same point on the last occurrence.
- introduced in version 1.0: Offset: Enter the Offset from a given point on the first occurrence to the same point on the next occurrence. For n occurrences: OverallLength=(n-1)*Offset.
- Specify the number of Occurrences (including the original feature).
- If the Update view checkbox is checked the view will update in real time.