Whether to change to left handed shooting depends on how much time she has spent shooting right handed and how off dominant she is. Minor cross dominance is easily solved by a "dot". A proper dot must be very accurately placed if it is the desired small size. Accurate placement implies something more permanent than grease or chapstick. The area to be blocked is the front of the gun, anything past the front of the forend, including the muzzle. This blocked area is to be determined while the shooter is in shooting position. The purpose of the dot is to see the target and target background with both eyes yet only have a view of the gun's muzzle area with the shooting eye (aiming eye). Sorry to conflict with other posters' perceived purpose of the dot, but the dot is not meant to block the target. If you block the target, you are back to one eyed shooting.
