MZR is an extension that can highlight multiple measures (character-per-line counts) in any line of text. This is meant to be a tool for web typography nerds that want an indication of desired "character-per-line" settings. Pick any element in your web page and give it a data attribute of `data-mzr=""`. Assign this attribute any number. You can assign multiple numbers separated by a `/` to indicate multiple character counts in one line of text. Peep the example below.