- Click “Photo Gallery” from the menu on the left of your WordPress dashboard.
- From the list under Photo Gallery, click “Options.”
- Under the “General” tab find the “Preload images” option.
- Click “Yes” to allow the Photo Gallery to load the specified number of images after opening them in a lightbox.
You can specify the number of images from the option underneath “Preload Images” labelled “Number of preload images.”