Switching between tabs in the thumbnails pane

This animation demonstrates how a transition between tabs in the thumbnail pane might look.

Clicking a tab slides the top-most tab off the screen while the lower tabs slide up to take its place. The removed tab is then placed at the bottom of the stack

Although not shown in this animation, clicking the bottom-most tab would slide both tabs above it off in the same way, causing the lower tab to slide up an reveal the removed tabs below.