https://trailhead.salesforce.com/trails/communities/modules/community_rollout_impl/units/community_rollout_impl_sharing

I'm wokring in the  "Create Sharing Rules" unit of the "Community Rollout Strategy" module.

I'm trying to set up a Sharing Set.  The first step is to find the "Customer Portal Settings".

The instructions say, "From Setup, enter Customer Portal Settings in the Quick Find box, then select Customer Portal Settings."

How can I find those settings?