2. Double-click Open to create a new blank document.
3. Then create a new file with 800*800 pixels, and click OK.
4. Find the cutting tool in the toolbar and select it.
5. For example, fix the size to 800*300.
6. Then add this size to the collection and click New Tool Preset.
7. Set the tool name to 800*300.
8. Pull on the canvas and you will succeed. Look at the size of the image cropping.