1. Right-click the marquee tool ---- ----- filler content identification.
2. Spot Healing Brush tool.
3. repair tool.
4. lasso at the first watermark want to copy the Ctrl + j ------ ----- Ctrl + i ----- inverted hybrid mode selection (color dodge) ----- then moves to reach the place to go to coincide with the original watermark is invisible to move up and down keys on the keyboard.