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: TRANSF : Object:MirrorShortcut
: mThis command mirrors the target object to the other side of a line or plane that passes through the fix point. If an element or the root is the target, only the 3D objects within it are transformed.
A parameter box appears requesting the axis direction for mirroring. For 2D objects, the choice is to mirror horizontally or vertical. For 3D objects, the choice is the x, y or z-axis