• To write on prelab and report PDFs without printing/scanning:
       => mobile devices typically have free or inexpensive apps for annotating PDF files
       => some online sites such as  dochub.com allows you to write on PDFs and pasting in pictures

• Canvas cannot handle large pdf files!

          Before submitting any pdf, please reduce the size of the file by using:
          pdfcompressor.com

          If you upload multiple files to pdfcompressor.com, it's better to download each compressed file separately if you don't want to deal with unzipping a zip file.

• If your report ends up in the form of multiple pdf files, please combine them (in the right page order!) into a single pdf file using: combinepdf.com