Where do you start on a ruler. Set a tab stop using the ruler. Diagram Of How To Read A Metric Ruler Reading A Ruler Ruler Cookware Set So get your rulers out. . You might spend weeks not knowing what a scale ruler is and even if you do what the heck youre supposed to do with it. A common mistake when learning to measure objects with a ruler is to not line up the object with the zero correctly. We always start from the 0 line on the ruler and we line our objects up with this point. On the Ribbon switch to the View tab all the way on the right. It is important to measure objects using the measurement lines on the ruler. Lets say a measure the pixels you are interested and lets say b Divide b a to get a very accurate estimate of the distance. Look to the opposite end of the object youre measuring and find the last number on your ruler that is alongside the object. Align the object you want to measure along t...