If you haven't turned SafeAssign on for an assignment, and you would like to check a particular paper with SafeAssign, you can submit the paper yourself. To do so, download the student's paper.
Once you do, click on "View course & institution tools" on the left side.
Then, click on SafeAssign at the top of the panel that pops out.
The SafeAssign window will come up. Click "Upload file".
You can select what happens with the paper. It can be checked for plagiarism and/or added to the SafeAssign database.
Then, drag and drop the student's paper into the box or click "Upload a file" to upload it.
The file will be uploaded and the requested actions taken. To view the report, click the Report button.