Create a new layer and type J to get the Healing Brush tool. Make sure Aligned Sample: Current and Below is selected in the Options Bar, and use the Healing Brush to get rid of any jagged edges. Sample smooth sections of the photo and paint over the seams to blend them together. This is a quick way to clean up areas, like the water, that are low on detail. While you’re working with the Healing Brush, use the tool to fix any blemished areas, such as spots or pen marks.