This page shows different layouts for galleries. At this time (Nov. 13, 2013) it appears that we have 4 different formats inside NextGen.
(1) NextGen Basic Thumbnail
(2) NextGen Basic Slideshow
(3) NextGen Basic Image Browser –
(4) NextGEN Basic TagCloud
CLICK HERE TO VIEW TagCloud PAGE
FYI – the tag cloud has not been built yet
(5) NextGen Basic Extended ALBUM