It is often helpful when preparing a presentation to be able to take a screenshot. This PDF handout explains how to do so on both a PC and a Mac.
If you need more help, we recommend scheduling an appointment with your assigned librarian. Find your assigned librarian here, as well as instructions on scheduling an appointment.
You can also drop in to the Service Desk on the 4th floor of Sackler and see a librarian on call. Librarians are usually on call Monday through Friday 7:30am to 5pm.