Onde screen rulers is an accurate virtual screen rulers on Mac, by which you can measure dimensions of objects in Pixels, Inches, Picas, Centimeters and calibrated units. In addition, a built-in protractor can measure angles in angles and radians. Detail Window provides an extremely helpful and unobtrusive magnified view of the area around your cursor to assist in selecting specific pixels and making accurate measurements. Magnifying Detail Window and arrow key control are very helpful. Rulers can be located to cursor's location precisely With Detail window for magnifying. Arrow key control is used for slight adjustment while rulers can be rotated 45 degrees at one time. Logger Window with memo serving as your personal notebook can remember all the detailed measurements data history. The memorize function will restore the rulers to their most recent position when the application was last closed. The screen rulers can be extended unlimitedly but always within screen. Set rulers on top, ruler colors and transparency as you need. Multiple keyboard shortcuts are available to operate the ruler.