Settings → Mark → Edit Mark

In this screen the marking document can be edited. This document must have been specified earlier.

Within the ruleset new marking rules can be added, the order can be adjusted and of course rules can be removed. The ruleset can also be sorted based on the search column.

Since Word has sometimes quite some trouble with special characters (such as quotes) in search/replace activities, it is strongly advised to use codes for that. As an additional tool there is an option to match symbols with their codes and vice versa.