To assign submitted abstracts to reviewers with any of these three methods:

Method 1. Simply enable automated assignment to let system assign abstracts to reviewers automatically. Go to this tutorial to see how you can enable automated assignment.

Method 2. Go to Manage/Assign abstracts, select abstracts in the list, then click on Assign Reviewers. This would list all the reviewers in the system. Simply select the reviewers to whom you want to assign the selected abstracts and then click on Save. 

Method 3. Go to an abstract, click on Reviewers & Reviews tab and select the reviewer to whom you want to assign this abstract. You have the option to display all reviewers in your system or only the reviewers who have similar topics as the abstract.