[Plugin: GRAND FlAGallery – Best Photo Gallery] Thumbnail Size & Buttons

Hi

1) How do I change the size of the thumbnails?
According to this, it should be located under options but I can’t find it?

2) How do I remove the ‘SL’ and ‘FS’ Buttons beneath the slide show?

Thanks!

https://www.ads-software.com/extend/plugins/flash-album-gallery/