Get the lowdown on the Levels palette, and find out how it works, what it does and how to use it to improve your pictures, writes Jon Adams. From checking that your image has good contrast and a full tonal range to applying colour effects like warm-up and cool-down filters, Levels does a lot for one, humble Photoshop palette. In this easy-to-follow video, I’ll take you on a journey deep into Levels, and reveal all you need to know to use it with confidence when assessing and enhancing your images.