Knowledge Manager includes a pattern builder that offers the choice of each function type in all possible forms, with and without optional arguments, for a total of eight, as shown in "Regular Expressions in Knowledge Manager."
After you select a form and click Add, you must put text between the quotation marks. More specifically, you must:
For Find, put text between the empty quotation marks.
For RegExFind and RegExMatch, substitute your desired text for regular expression and/or key.