# Distance to Mainline

If the mark rectangle for one or more characters in your strings might not rest on the baseline, specify a nonzero value for CharacterFragmentMaxDistanceToMainLine. This can occur if you are using characters such as the lower-case “j” which would rest below the baseline, or characters like a colon “:”, which rest above the baseline.

The parameter is expressed as a percentage of estimated line height and has a range between 0.0 and 1.