Nikon D720 User Manual page 84

❚❚ Time
1
Rotate the mode dial to M.
2
Choose a shutter speed.
While the exposure meters are on, rotate the main command
dial left to choose a shutter speed of "Time" (%).
Main command
dial
3
Open the shutter.
After focusing, press the shutter-release button on the
camera or optional remote control, remote cord, or wireless
remote controller all the way down.
4
Close the shutter.
Repeat the operation performed in Step 3.
60
Mode dial
Control panel Monitor