Nikon Z 7II User Manual page 246

D
Continuous H (Extended)
Depending on camera settings, exposure may vary erratically during each
burst. This can be prevented by locking exposure ( 0 133).
D
The Memory Buffer
•
While the shutter-release button is pressed
halfway, the frame-count display will show
the number of pictures that can be stored in
the memory buffer.
•
When the buffer is full, the display will show
r00 and the frame rate will drop.
•
The number shown is approximate. The
actual number of photos that can be stored in the memory buffer varies
with camera settings and shooting conditions.
The c / E (Release Mode/Self-Timer) Button
129