Attach tool: If you have two images that you want to cut exactly as they appear on your screen (like individual letters in a word), you need to select all of the images and click "ATTACH". This will ensure that the images are cut the same way they are shown on your screen. Weld Tool: If you have overlapping images that you want them to cut as all one big piece, you need to "WELD" those images together. For example a square and circle. If you do not weld them they will both cut as individual images. If you click "weld" you are creating a new shape from the individual shapes.