From FreeCAD Documentation
- Select one or more edges and/or Point objects. Constraints restricted to the selected elements are also processed. Any other constraints associated with the elements will be deleted.
- There are several ways to invoke the tool:
- Press the Array transform button.
- Select the Sketch → Sketcher tools → Array transform option from the menu.
- Right-click in the 3D view and select the Array transform option from the context menu.
- Use the keyboard shortcut: W.
- The cursor changes to a cross with the tool icon.
- The Translate parameters section is added at the top of the Sketcher Dialog.
- Pick the start point of the translation vector. Or with Pos-OVP: enter its X and/or Y coordinate.
- Pick the end point of the translation vector. Or with Dim-OVP: enter the length and/or angle of the vector. The angle is relative to the X axis of the sketch.
- The elements are moved. No Pos-OVP or Dim-OVP based constraints are added.