[ ] images are shrunk to a representative icon on drag so that they don't completely obscure the target.
NOTE: can either use a 20 x 20 (or other small) sized version of the image itself, or use something like the plus icon that appears when copying a file from one location to another in finder
NOTE: can either use a 20 x 20 (or other small) sized version of the image itself, or use something like the plus icon that appears when copying a file from one location to another in finder