This is especially useful for Trees, since there is no snapshot tool available for them. You also have the option to click on the little folder icon and put your own custom preview image here, just like you do when sharing an item or updating. When you save an asset in the Asset Editor, you can choose to attach a snapshot from the game's Snapshot tool as a preview image for the item, as you surely know already. Let me begin by explaining the difference between Workshop and Content Manager preview image.