The Thumbnails panel displays thumbnail images.
If the Series option button is selected on the Thumbnails panel, then each thumbnail image will represent a Series currently loaded in RemotEye, and the number of displayed thumbnail images will be equal to the number of Series currently loaded in RemotEye. Also, in this case the thumbnails will be grouped by Study.
On the other hand, if the Image option button is selected on the Thumbnails panel, then each thumbnail image will represent a single Image currently loaded in RemotEye, and the number of displayed thumbnail images will be equal to the total number of Images currently loaded in RemotEye. Also, in this case the thumbnails will be grouped by Series.
Drag&drop of images or series from the Thumbnails panel to the Main Image panel is supported. You can also select multiple thumbnails in the Thumbnails panel, by the Windows-usual SHIFT-click or CTRL-click, and then dragging & dropping all selected images or series (depending on the active mode) to the Main Image panel.
Double-clicking on a thumbnail image will load the Main Image panel with the scene starting at the double-clicked series or image.
The thumbnail panel may be hidden or shown by clicking on the small down and up arrows appearing at the top left of the panel itself.