When the Nikon D3400 camera is in shooting mode, its standby timer feature saves battery power by putting the Information display and viewfinder display to sleep after a period of inactivity. Similarly, the camera limits the Image Review period (the length of time your picture appears immediately after you press the shutter button), the length of time the Live View display remains inactive, how long a picture appears in playback mode, and how long menus remain onscreen.
Customize auto shutdown timing here.
You can control the auto-shutdown timing through the Auto Off Timers option, found on the Setup menu and shown on the left here.
Customize auto shutdown timing here.You get four choices, as shown on the right in the figure. The first three rows in the table show the shutdown times that result when you select Short, Normal, or Long. (Normal is the default.) Select Custom to adjust the shutoff times for the various features separately; the range of delay times for each feature appears in the last row of the table.
Auto Off Timers Options
| Option Name | Standby Timer | Live View | Image Review | Playback/Menus |
| Short | 4 seconds | 5 minutes | 4 seconds | 20 seconds |
| Normal | 8 seconds | 10 minutes | 4 seconds | 5 minutes |
| Long | 1 minute | 20 minutes | 20 seconds | 10 minutes |
| Custom | 4 seconds to 30 minutes | 5 minutes to 30 minutes | 4 seconds to 10 minutes | 8 seconds to 10 minutes |
To disable Image Review altogether, head for the Playback menu and set the Image Review item to Off.
