Increase number of people per page?

Posted by mywaytoo on Mar 12, 2012; 4:30am
URL: https://support.nabble.com/Increase-number-of-people-per-page-tp7364181.html

I want to make my list of users longer. I've found this:

<macro name="people_page_length">
        20
</macro>

So I guess that I can change "people_page_length" to 40... but how??????