There are a few ways to resize an element in Photoshop. The easiest way is to use the resize tool on the left side of the screen. You can resize the element by clicking and dragging it around, or by pressing and holding down the shift key and then dragging. If you want to resize an element in a specific direction, you can use the arrow keys to move the element in that direction, or use the up and down arrow keys to change its size.