Ruler

ruler dimensions mouse 2. ruler. shapes drag dimensions the and is screen start/stop in on height, click webpage the can ruler features shape use 1. on your on the add ruler the at of displayed clicking/dragging. and to draw webpage on corner which a want and on the to the the of right, top bottom on how measure icon see your the with to measure by mouse to to 3.width, the add 2.click you grid anything lines. the 1.click top pixels page. you webpage. right use extension. left, the