quick look spreadsheets when you don't want to wait half a minute for excel to load. Quick look pdfs with nondescript names that you've downloaded to check pape

quick look spreadsheets when you don't want to wait half a minute for excel to load. Quick look pdfs with nondescript names that you've downloaded to check paper titles/authors, quick look ppts youve been emailed (from within the email app) to see if they're worth reading in depth.