The clone stamp tool is a great tool used by many redrawers to copy one area of an image onto another area. It's mostly used for expanding patterns and joining spreads.
Some redraws can be done solely with the help of this tool. However it shouldn't be used carelessly, as it might not look genuine.
Before using the clone stamp tool make sure that you set the settings accordingly:

To use the clone stamp tool you must:
- set the area of origin you want to clone by holding Alt+Right Mouse Button,
- then press the Left Mouse Button to apply the brush where you need to.
Make sure you're careful when cloning patterns so that the original patterns and the cloned patterns match nicely. If you need more patterned area, just repeat the drill.
Creating a pattern template by cloning:

Something very useful to know is that once you apply the cloned area onto a layer, the tool will lock on that position. So if you undo the cloning, the tool will still remember where you last applied the cloned area.
This is useful when you can't allign the patterns without overlaying the surrounding art. So to solve this problem you first allign and apply the cloned area,
then undo and reduce the size of the cloning tool's brush. This allows for more precise cloning. See gif below:
