Probably surprisingly few! I use my TV as a computer monitor and Charlotte will sometimes "hunt" the mouse cursor, but all her pawing at it has left exactly zero marks on my screen!
To be fair, your wall mileage may vary.. Which is a very weird sentence.
Growing up, we had Snickers. She was a Goldie-something, and hands down one of the best dogs ever.
(She had coloration similar to a Rottweiler- back body, with brown eyebrows and brown belly, but otherwise had hair and body conformation like a typical Goldie.)
In any case; when she was young, she loved to attack nature docs on the TV. Or any animal on the TV, to the extent that you could see scratched on the glass after it was turned off. (The scratches were likely in a laminate layer or something. But they were there and they were permanent.)
So I have a theory that defines βbest dogβ as being related to proximity. Both, physical, literal proximity and more figurative terms.
All Snickers wanted, was to be with you. Touching was best. Not much, mind. Sheβd settle for sitting against your leg, or a head against your knee, maybe a hand scratching the ears.
Was one of the best dogs of all time. Super chill.
This was more of a one-off. My wife wanted the projector for other projects, but she was testing it out here. We usually throw these vids up on the TV, which is just out of reach for the both of them. But the TV is only 65". The projection was probably close to 12' diagonally.