Hi Laura and welcome to the forum:
By 'mirror camera screen' do you mean repeat what it displays on another device? If so what device do you have in mind - monitor or TV screen, for example?
cheers, TREVOR
"The Amount of Misery expands to fill the space available"
"All the variety, all the charm, all the beauty of life is made up of light and shadow", Leo Tolstoy;
"Skill in photography is acquired by practice and not by purchase" Percy W. Harris
