The Gallery window contains three tabbed thumbnail arrays.
RX: If the Autsoave is enabled in the RX window, then the images are stored in this thumbnail array and on disk.
If there are more then 12 images, the oldest in the image array will be overwritten (not overwritten on disk).
TX: This array holds images you can directly transfer to the TX window.
Template: These images are used as an overlay in the TX window.
Right clicking on the thumbnails shows a popup window:
New: opens the editor and creates a new empty image.
Load: loads the thumbnail with an existing image or template.
To Tx: transfers the image to the TX window.
Edit: opens the editor to edit the thumbnail.
Print: prints the thumbnail.
Delete: deletes the thumbnail from the array. It does not delete the file on disk.
Properties: shows the properties of the thumbnail.