When viewing a PDF document in Canvas or Perusall, it is often not possible to print the document directly from your web browser. In those cases, if you first download the document and then open it on your computer, your default PDF viewer should allow for printing. If not, try a different PDF viewer such as Adobe Reader.
Note: if Downloading from Perusal is not possible, you may need to speak to your instructor about their enabling downloading in the settings for that document. Or, submit a Service Request and we will reach out to the instructor.