Why does the Project Table use measuring rules with two different scales?

Usage of the measuring rules is explained in detail in the owner’s manual. The primary rules are used for measuring cuts greater than 8" long or wide. The secondary rules are used for measuring cuts less than 10" long or wide. The Repetitive Stops can be positioned with in two ways to align correctly with either the primary or secondary measuring rules. Each Repetitive Stop has a protruding tab that aligns with the rule, and an arrow that points to the proper rule to use, depending on orientation of the Repetitive Stop.