The thumbnail viewer is context sensitive and depends on either an asset browser folder to be viewed or a project tab folder entry to be viewed.
The thumbnail viewer displays both 2D and 3D media.
The 3D media is displayed with a default texture to identify the UV mapping orientation.
All video thumbnails will display a frame from the middle of the video. They do not show the first frame.
When used with the project tab and selected devices such as layers or cameras, you may double click on any thumbnail to assign it to the current selection of devices.
Please be aware that all thumbnail images are stored locally. If the media is not present on all Clients you may have to spread the media to all Clients in order to assign it to the selected devices.