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

topexitpages             10              (or another number, or all)

The How Many Exit Pages? ^{(topexitpages)} option indicates how many of the most frequently usedexit pages should be shown at each level of the Chart Top Exit Pages ^(exitpages) report. By default, the top ten exit pages are shown. The sorting order is determined by the ^{(exitpagesorder)} option. You may specify any whole number of items, or the word all.