Component patterns and mirrors
A row of identical parts is placed by a pattern, not by copying.

Linear pattern of components
- Select a part and press Linear pattern of components — or press the button and click the part.
- In the bar above: Copies and Direction — X, Y or Z. For a grid tick 2nd dir. (and on top of it 3rd dir.) — each with its own count of copies and axis.
- The Pitch of each direction goes into the fields at the geometry. Enter applies, Esc cancels.
Circular pattern of components
- Select a part and press Circular pattern of components.
- In the bar: Copies and Axis. By default the axis is the assembly's Z; with the axis button pick a datum axis, a straight edge, a cylindrical face or two points in turn. An axis taken from a part follows it on an edit.
- Full circle spreads the copies round the whole circle; without the tick the angle of a sector appears at the geometry. Enter applies.
One row instead of a handful of copies
A pattern is one row of the assembly timeline: the count and the pitch are edited in one place (a double-click on the row), and a delete removes all the copies at once. Deleting one copy removes the whole pattern: the pattern leads its place, it does not live on its own. Editing the source part changes all the copies.
Mirrored copy
Press Mirrored copy, pick a part or a subassembly and point at a plane — XY, XZ, YZ, a datum plane or a face. A mirrored copy appears: a left hand out of a right one. It can be moved by its gizmo; its shape follows the source — editing the original carries over to the reflection.