Free on screen pixel ruler software for windows:The ruler easily measures objects on your screen. It's an ideal tool for designing web sites, working with graphics and perfecting the look of your digital products. The reading guide helps you read through text on your screen much like a ruler edge helps you read through lines of text on a printed page. This makes A Ruler for Windows an ideal tool for dealing with long e-mails, wide spreadsheets and fine print documents on your screen.