Cropping is a simple Photoshop technique where you use the crop tool to adjust the size of the preview box and choose how big you want your finished image, such as lining up the grid with the center of the subject and positioning it close to the rule of thirds. The document demonstrates cropping by showing an "Before" and "After" shot of the technique.

1. Cropping
4 Different Photoshop Techniques:
Before
After
Cropping is pretty simple. You click on the
crop tool from the side bar (as seen below)
and adjust the size of the preview box to
choose how big you want your finished
image. I lined up the grid with the centre of
the subject and positioned it as close to the
rule of thirds as possible.
The after shot is the result.