Pixel Ruler is a free application that claims to allow you to use your mouse to dynamically measure pixels. With it, you can accurately measure selected onscreen views in pixels, which can help when configuring image formats, creating graphics, and scaling images. It shows measurements in pixels up to 2,500 pixels in width or 1,500 pixels in height.
After a painless download and a surprisingly detailed installation process, a horizontal ruler appeared on our screen. There's also a ruler for vertical measurement. The interface consists only of these rulers; there are no navigation buttons or other controls. … Read more