On the request form for your venue, click on the ‘Recruitment’ button to recruit reviewers (and ACs if applicable). You can use the 'Remind Recruitment' button to send a reminder to Reviewers who have not yet accepted or declined your invitation.
All invited reviewers will appear in the group venue_id/Reviewers/Invited
Reviewers who accept the invitation will be added to the group venue_id/Reviewers
Reviewers who decline the invitation will be added to the group venue_id/Reviewers_Declined.
You can find links to these groups on your PC console.