Google ANDROID 2.3.4 - Manual (Page 285)

Gallery 285
AUG-2.3.4-105 Android User’s Guide
Change how the contents of an album are displayed
You can view the images and videos in your albums in a chronological grid or in stacks,
sorted by the date and the location where they were taken. You switch album views
with the Album View switch at the top right of the screen.
S Drag the Album View switch to the right to view the contents of the
album in stacks.
S Drag the Album View switch to the left to view the album contents in a
chronological grid again.
Stacks are sorted by the date and
location where you took them.