Step 3: Resize The Selection
As its name implies, Photoshop’s Transform Selection command allows us to make changes to the selection outline itself without affecting anything inside of the selection. In this case, we want to resize the selection outline and make it smaller until it surrounds only the part of the photo that we want to keep, allowing us to
crop away everything else. To resize the selection, hold down your Shift key, then click on any of the handles (the little squares) in the corners of the selection and drag the corner inward. Holding the Shift key down forces the width-to-height aspect ratio of the selection to remain the same as you drag, which is what allows us to maintain the same aspect ratio as the original photo.
You can move the selection outline as well by clicking anywhere inside of the selection and dragging it to a new location. Just don’t click on that little target symbol in the center of the selection, otherwise you’ll move the target symbol, not the selection. Continue moving and resizing the selection as needed until it’s surrounding only the area you want to keep:
Hold Shift and drag any of the corner handles inward to resize the selection outline while keeping the aspect ratio the same.
When you’re done, press Enter (Win) / Return (Mac) to accept the transformation.
Step 4: Crop The Image
At this point, all that’s left to do is crop away the area outside of our selection! For that, we can use Photoshop’s Crop command. Go up to the Image menu at the top of the screen and choose Crop:
Go to Image > Crop.
As soon as you select Crop, Photoshop goes ahead and crops away everything that falls outside of the selection, leaving us with a cropped version of the photo that maintains the exact same aspect ratio as the original:
The aspect ratio of the cropped image remains the same as the original photo.