Last week we chatted about pixels and resolution, and the importance of deciding what an image's purpose in life shall be. "To print, or not to print," that was the question. This week, I'll show you how to navigate inside the Image Size dialog box, enabling you to tweak image resolution and sizes at will. Though this tutorial is done in Photoshop Elements, the steps are nearly identical in the full-blown version of Photoshop.

To illustrate how tweaking the resolution of an image affects its document or physical size, let's take a peek at resizing a web image.