To login to Perusall, type into the address bar in your browser. If your instructor registered Perusall with the Learning Management System at your university, you can login directly. Otherwise, login with your Facebook, Twitter, or Google accounts (or your email if you have none of these) and click Enter an access code and type your course access code. (If you haven't received an access code, contact your instructor.)

Once you log in, you will be directed to the course homepage, which shows you a list of all the reading assignments and deadlines that your instructor has assigned for the course. To access the reading material for each assignment, simply click on the link for that assignment. A thumbnail of the document for the current assignment appears next to the link. Assignments for which the deadline has already passed are hidden; you can view them by clicking the plus sign next to its deadline.

When you open a document, you'll see highlights superimposed on the document that represent comments that you and other students have entered. Yellow highlights indicate comments or questions by you or other students; blue highlights indicate comments from your instructor. When someone responds to your question or comment, you will receive a notification by email and you can post a reply by signing on or merely replying to the email. If you ask a question, you can indicate that one or more of the responses answers your original question.

You can add a comment by simply highlighting text (clicking and dragging on a computer, or long pressing on a tablet) - once you finish highlighting you will see a panel open on the right where you can type your comment. Press Enter to submit the comment; your classmates will see it appear in real time. To add to a conversation started by one of your classmates, simply click on the highlight in the text to open up the conversation panel, type your comment, and then press Enter.

You can also highlight part of a figure rather than text by using the toolbar buttons at the top. When you have elected to highlight a figure, click and drag to draw a box around the area of interest, or simply click to drop a map pin.

While reading the document, you can change which comments you see by clicking the All comments dropdown at the top of the page and selecting either My comments or No comments.

You can view your scores by clicking the My grades button at the top of your course home page. The scoring is based on the quality and timeliness of your comments, questions, and responses.

You may continue to ask questions, answer questions, and make comments outside of the context of a particular reading assignment. However, note that if you edit a comment that was counted towards an assignment whose deadline has passed, that comment may no longer count towards your score for that assignment.