Infor Operations and Regulations magnifies the roadway diagram according to the magnification level you specified, sometimes changing the roadway's displayed length and ruler increments. For example, if you're viewing mile 5 to mile 20 of a roadway and you increase the magnification from 1 to 50, the Roadway InfoViewer will still show mile 5 to mile 20 of the roadway but it may change the ruler increments to show every half or quarter mile instead of every 5 or 10 miles.
Note: To show the roadway's original length, right-click anywhere in the ruler and select Fit entire length to screen.