You can add several different filters to your gallery thumbnails in FooGallery Pro. The filter you select is applied to all of the thumbnails. In other words, you can’t select different filters for each thumb. But the filter will not impact on the the full-size images.
You can see the different filters available to you on the demo page.
To make use of this feature, go to your gallery’s settings. Under the Appearance tab, you will a setting for Instagram Filters. If you click on this, you will be able to select the filter you would like to apply.
Once selected you can preview the gallery, with the filter applied, by toggling over to the Gallery Preview tab above the gallery settings.