Nikon D780 Reference Manual page 51

D
The Connector Covers
Be sure to close the covers when the connectors are not in use. Foreign
matter in the connectors could cause malfunction.
D
The Speaker
Close proximity to the speaker could corrupt data stored on magnetic
stripe cards or other such magnetic storage devices. Keep magnetic
storage devices away from the speaker.
D
The Monitor
The angle of the monitor can be adjusted as shown.
Getting to Know the Camera
5