Many writers have certain patterns that they know they need to watch. It's common to add an apostrophe to a trailing "s", even when the word is plural, not possessive. Words that end with "ing" may need to be replaced with a stronger word.

This feature highlights letters that match a pattern. The patterns include common spelling, word misuse, and word overuse patterns that are worth checking.

The default patterns include "ly", "ing" and "'s".

New patterns can be defined in the General Preferences dialog.