Using Show Leads will make the process of handing and posing a dog much easier. Even if you are just letting a dog be a dog, you will find that some dogs benefit from a show lead because it keeps them from wandering off.
Show leads are thin nylon leads that are used in the ring with show dogs. They are not for use outdoors or in any situation where they would be the only means of restraining the dog. I use them primarily in the studio and to give a dog the confidence to stay in the place you want them. The leads are small enough to be easily removed in post production.
Most dogs will not need a show lead, but for those who do, it is an invaluable time saving tool!