If you prefer to manually edit your configuration files, use the following syntax for this option:

topusers                10              (or another number, or all)

The How Many Users (Determined By Cookies)? ^(topusers) option indicates how many of the highest-ranked users (as identified by "cookies" in the server log) should be shown in each report. By default, the top ten users are shown. The sorting order is determined by the Top Users Report (Requires Cookies): Sort by ^(usersorder) option. You may specify any whole number of users, or the word all. To turn off user reporting altogether, use the Chart Top Users (Determined By Cookies) ^(users) option.