How to open Nikon z50 viewfinder?

1. First make sure that the camera is turned on and in shooting mode.

2. Then, next to the viewfinder at the top of the camera, there is a switch button, usually marked with "EVFLCD" or similar words. Press this button and the viewfinder will open.

Finally, the viewfinder will not automatically adjust the brightness and contrast. You can adjust it with the adjustment knob next to the viewfinder.