In Pictures: How to Clean and Retouch Old Photos w...
13. Position your new selection over the right-hand side of the mouth and left-click. Then mirror your selection Ctrl-M and, using the move tool on the tools palette, adjust its position until it looks natural. Ctrl-D and the selection will join your newest layer. Double left-click this layer and name it Raster 2.
In Pictures: How to Clean and Retouch Old Photos with Paint Shop Pro