If groups have been created in your account, you can add groups to a checkpoint.
Any groups added to your course automatically display all the group users in the Learners tab. If a user was added to a course through a group, the only way to remove a user is to ask a manager or an admin role to edit the user's group. You can also choose to remove the entire group from the course.
Note: Some features may be restricted based on permissions for your user role.
Open Author Menu

In the Global Navigation menu, click the Author icon. Then, click the Checkpoints menu option.
Note: The Global Navigation menu may differ based on what is enabled in your account.
Open Groups

On the Checkpoint Details page, click the Groups tab.
Add Group

Click the Add Group button.
View Group
View the group in your checkpoint. For large groups, it may take a few moments before individual users appear in the Learners tab.
To view users in the group, click the name of the group.