Just set the Thumb width and height, select the desired option for image proportion, set the colour for the text that appears under the folder navigation, choose whether you like the gallery to have navigation commands or not, and last, choose the navigation icons (you can choose between several predefined sets of icons).

You can also customize the borders and the lightbox colour and icon set.
Its main features are the auto-generated thumbnails and the subfolder management!

Those who are looking for a simple, yet powerful photo gallery will not be disappointed:
Automatic thumb generator integrated
Dynamic folder navigation
Integrated JQuery customizable lightbox
Design customization options
Multiple navigation icon sets
Works on mobile devices iPhone/iPad and Android devices
Works in all major browsers - IE9+, Safari, Opera, Firefox, Chrome
All of these done in no time!