For a long time pdflatex has offered the command \pdfannot for inserting
arbitrary PDF annotations. However, the command is presented in
a form where additional knowledge of the definition of the PDF format is
indispensable. This package is an answer to the – occasional – questions
in newsgroups, about how one could use the comment function of Adobe
Reader. At least for the writer of LaTeX code, the package offers a
convenient and user-friendly means of using \pdfannot to provide comments
in PDF files. Since version v1.1, pdfcomment.sty also supports:

       LaTeX -> dvips -> ps2pdf, LaTeX -> dvipdfmx and XeLaTeX.

Unfortunately, support of PDF annotations by PDF viewers is sparse to
nonexistent. The reference viewer for the development of this package is
Adobe Reader.

License: LPPL

Changes in v2.3a:

- Bugfix: problem with boxes around tooltips [jk]
          spurious backslash in "/Ff/65536\space%" in line 2967, see:
          https://bitbucket.org/kleberj/pdfcomment/issue/8/pdftooltip-tooltip-area-is-displayed-like
          http://tex.stackexchange.com/questions/34698/strange-appearance-of-tooltips-produced-by-pdfcomment

          reported by: diabonas