You can change the ruler unit from inches to centimeters, millimeters, points, and Picas. Points are used when you need to simulate pixels, while Picas are typically used to represent fixed ...

Here is a ruler and some straight lines for us to measure. There are 10mm in 1cm. 1cm = 10mm. We can round measures up if they are less than a whole cm. If a number is 5mm or or above, we round it ...