In the previous lesson we covered some ground on pixels, bitmaps, and the relationships between bit-depth, file size, and image quality. In this lesson, we will discuss related concepts like image resolution, image size in pixels, Image dimensions, and how to go about changing the size of an image.

More specifically, your goal for this lesson is to expand your knowledge of bitmap images and image processing in Photoshop by learning about image resolution, learning how to change the size of an image, learning about image dimensions and constraints, and learning how to change the document size of an image.