1. Get to Stamp Tool, tap on the “Lasso” icon under the bottom.
2. Draw an outline you wish to crop.
3. Tap on the “camera” icon. The image inside your stamp box will be taken.
Hint: It will only capture the image of the current layer/ground you are in.
4. You can move it by dragging the stamp frame around.
5. Tap on the “Stamp” icon to stamp.