Any faculty user can create an assignment link using SafeAssign.
1) In any content area in your course site, click on Assessments to open the dropdown menu and select Assignment (Note: if you have to create a content area, click "+" sign and select Tool link. Type "Assignments" or the name of your content area and then select Available to Users.)
2) In the Create Assignment page, expand Submission Details
3) Select Check submissions for plagiarism using SafeAssign.
For the detailed information, click this link of how to create an assignment menu using SafeAssign: https://uofi.app.box.com/file/216323046998