How can I transfer spot boundaries from one gel to another?

To transfer spots, right click on the thumbnail of the gel in the Light Table which contains the spots you want to transfer, and choose "Transfer Spots ..." from the context menu. You will be able to choose your target gels in the following Spot Transfer Dialog.

Please note: Since warping informations between gel images are necessary for transferring spots from one gel image to one or more others, it only works within a project and between gel images with valid warping informations.