裁切工具
At its most basic, the crop tool allows you to size a rectangle around an area and reduce your image or layer to only that content which is contained within that area. There are several options which give a bit more flexibility and precision.
The two numbers on the left are the exact horizontal position and vertical position of the left and top of the cropping frame respectively. The numbers are the right are from top to bottom: width, height, and aspect ratio. Selecting the check boxes will keep any one of these can be locked to allow you to manipulate the other two without losing the position or ratio of the locked property.
中间对齐
Keeps the crop area centered.
增大
Allows the crop area to expand beyond the image boundaries.
在 5.0 版更改.
Lets you apply the crop to the whole image or a subset:
When you are ready, hit the Crop button and the crop will apply to your image.
Decoration
Help you make a composition by showing you lines that divide up the screen. You can for example show thirds here, so you can crop your image according to the Rule of Thirds.