1. Layer > Transform > Flip Horizontally.   2. Click on the Flip Horizontal icon on the tool bar (blue and gray triangle mirrored)   Can't Warp or apply a vector Mesh distortion in AD yet. For now you can copy the element, take it into Affinity Photo Beta and apply Perspective and Mesh distortions, then copy it back into AD. NOTE: The object will now be rasterized, so make sure you start with a large enough object at the appropriate resolution.