Is there a preferred name for the large format photography 'cloak?'

Factual Questions
1

For viewing the image on the backside, as in this example.

2

“Dark Cloth” or “Focusing Cloth."

3

Under the cloth.

We always just called it the cloth.

4

Thanks!

5

Old joke:

Model #1: What’s he doing under that cloth?
Model #2: He’s getting ready to focus.
Model #1: What, both us?

6

The ground glass focusing screen is hard to see with ambient light all around. I used to bring a loupe under the cloth to critical check focus.

ETA: Nice joke

7

::Hole Punches Your Nerd Card::