Nikon Tip/Trick #1 - Sharp Images
Programming the OK Button
This will ensure you get sharp images
For Live view
To improve your focusing in live view mode. Programming the OK button in this way will enable you to quickly zoom in when in the live view mode which will allow you to focus much more accurately.
Menu (Button on back of the camera)
Custom Settings Menu (Pencil icon on screen)
Controls (f – on the menu on screen)
OK button or ‘Multi selector center button’ (depends on model) Live view (scroll to select this option, and press OK )
Zoom on/off (Press OK)
1:10 (100%) (scroll to select this option, and press OK )
Menu x2 (To exit click the Menu button on back of the camera twice
For Playback
To ensure you've captured a pin sharp image simply press the OK button when in review mode and you will instantly be taken to a 100% zoomed in view of the focus point
Menu (Button on back of the camera)
Custom Settings Menu (Pencil icon on screen)
Controls (f – on the menu on screen)
OK button (depends on model) Playback mode (Press OK )
Zoom on/off (Press OK )
1:10 (100%) (scroll to select this option, and click that OK button)
Menu x2 (To exit click the Menu button on back of the camera twice)
Helpful tip - I’ve been using this for a while on my D850 and have found it invaluable. Highly recommended!