The Screen Calipers can be used with any program where fast and accurate measurements are required. Manipulating the application is simply accomplished through use of the mouse, and a variety of keyboard controls allow for extra fine alignment. Originally created for graphics and web professionals for onscreen html layout, the Screen Calipers are currently being used by thousands of people for hundreds of uses. The Calipers has appeal for practically any computer user who stores their photos, plans, diagrams or images on their computer. The Calipers can be used for: - HTML webpage layout - Graphic design illustration and layout - Digital photo adjusting and resizing - Hobbies and Crafts including sewing and model building - Educational projects for physics and shop class - Computer Aided Design with engineering blueprints and architectural plans - Medical measurement for electrocardiograms and X-Rays The latest version of the Screen Calipers runs on Mac OSX 10.2+. The Screen Calipers are free to evaluate for an unlimited time; a single user license costs $19.50. Screen Calipers measure in pixels, inches, centimeters, points, picas and twips. Using the configuration screen additional units of measurement can be easily defined to suit any situation. 360 degrees rotation has been added to the Calipers making them the most useful on-screen measurement application ever made. The Screen Calipers has numerous keyboard controls. By pressing Ctrl, Shift and Alt while dragging with the mouse the Calipers will extend, rotate or snap to 90 degrees. To aid measurement the Caliper's mouse pointers will change making alignment intuitive and simple. Version 3.2 comes with three additional skins; "Tall" and "Small" help in measurement of large objects and hard to reach areas. The "Technical" skin adds extra buttons for expert alignment. Many more skins in a variety of colors and styles are available for download from the iconico.com website.