Update: 9/ 30/ 21 checked content for accuracy. why annotate pdfs on windows 10? best for annotation: pdfescape creating or reading a pdf is simple enough, but if you want to edit or annotate a pdf without changing it to a different format ( or disturbing its layout), you' ll need to have a dedicated pdf editor on hand. updated pdf architect 7 to version 8. save time editing & highlighting pdf online. there is no “ annotate” windows 10 pdf annotation button. no installation needed. you can draw or write on the pdf, highlight text in different colors, or make a comment. windows 10 includes microsoft edge as the default browser, and you can use the microsoft edge pdf viewer to edit pdfs for free, directly in the browser. single place to edit, collaborate, store, search, and audit pdf documents.