How to enable and use Pretty Photo Settings?

Pretty Photo settings in WP Diary are used to create a pop-up panel of the image in the gallery. If you have a gallery set on your site with the WP Diary theme, enabling Pretty Photo settings will allow you to display a pop-up panel of the image that has been clicked.

WP-Diary Preety Photo Settings — ^{Make sure you’ve got your image gallery set before enabling this option!}

To enable this:

Go to your WordPress Dashboard and head to Appearance > Customize.
Then look for Additional Features in the customizers and go to Pretty Photo Settings.
Toggle on the Enable Pretty Photo in Post/Page Gallery option in the given section.
Click on the Publish button to save the changes.