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 v2.3: - reimplemented \pdfmarkupcomment by using soulpos.sty much better support of non standard text cases, like: \twocolumn: feature request by: René Schwarz, Thomas Feller, Til Birnstiel setspace.sty: feature request by: Andrew Dawson enumerate, itemize, ... - added support for twocolumn mode in \pdfsidelinecomment - added option local to \pdfcommentsetup feature request by: Florent Chervet