There are two ways to invite users to review a procedure.
1. Select Pending Review from the status box on top.
2. Click on "Finish"
A dialog box will appear and prompt you to invite others to review the procedure.
3. Click on the desired user and click "Send invite" to send invitations.
The invitation will be sent by email to the users you select.
The second way to invite users to review procedures is to use the invite icon in the review tools on a procedure that is already in Pending Review Status (the one that looks like mail.) Click this icon to open the invitation dialog box.