Quick Mirror

To be able to work, a free area ( a zone with a sole colour) has to be next or Surround the basic part.To proceed quickly, just before making a symmetry, i suggest three methods: -Increase canvas size. -Select the zone you wish, and do a Layer via copy (Photoshop: Ctrl + J)-Select the zone you wish, invert the selection (Photoshop: Shift+Ctrl+I) then erase (Suppr). Do not forget to deselect (Photoshop: Ctrl +D).