Hello,
Welcome to the party
There is a few places.
- Random and new images on gallery Home. AdminCP => vBa Gallery => Modify Settings => Main Index Page Options
New Images on Index
The number of new images you would like to appear on your gallery's main index page. Set this to 0 to disable it.
Random Images on Index
The number of random images you would like to appear on your gallery's main index page. Set this to 0 to disable it.
- Browse Category Options
Images Per Page
The maximum number of images to display on a page before splitting into multiple pages.