I am a long time Nikon user and create several different kind of photographs. Accordingly the settings I use for underwater wide angle reef scenics and macro images are different than those selected for portraits of people on the beach, or landscape portraits.
When creating landscape portraits, using live view allows me to see the depth of field, use pinpoint focus, & easily observe the histogram.
Underwater however, the live view does not work. There are many situations underwater where the camera settings are 1/250th at F20. If I used live view, the light meter in the camera would be pegged and viewing area would be dark. I would be unable to look through the EVF or back monitor to focus, compose and fire.
By turning off live view, now the Z7II camera behaves like a DSLR. In this manner, I can view the image in the viewfinder, regardless of the ambient light and the exposure settings.
To set this in the camera, simply go to Live View Display > Setting Effect OFF.
It is possible to set the camera up for underwater and for land using the custom settings. That is a topic for a future post.