mirror the currently selected object.
A parameter setting box will appear when selecting the mirror command, as the Figure shows.
Scale: the zoom ratio of the X/Y size after being mirrored.
The current object’s vertical mirror.
The current object’s horizontal mirror.
Select a datum mark of an object.
Apply to copy object: This item is used to copy the currently selected object and mirror it into a new place.
Apply: Let the modification of the current object active.