Adobe ACROBAT READER 7.0 Manual page 95

About adding comments
A comment refers to a note, highlighting, stamps, and any other markup that you've added
to an Adobe PDF document using the commenting tools. A note is the most commonly
used comment. In Adobe Reader, you can add comments only if additional usage rights
that enable commenting are added to the PDF document by Adobe Acrobat 7.0
Professional or Acrobat server products. Otherwise, commenting tools aren't available.
(See About Adobe PDF documents with additional usage rights.) If commenting is
enabled, you can place comments anywhere in the document, and you can determine the
style and format of the comment.
Note: If commenting is enabled in a PDF document that is not part of a review workflow,
you must save the PDF document to your local hard drive to add comments; commenting
tools won't be available in the browser window.
The tools you use to create comments are located on the Commenting and Drawing
Markups toolbars. These toolbars are listed under the Tools menu and the Comment &
Markup pop-up menu. The Note tool lets you add the equivalent of a sticky note to your
Adobe PDF document. Other tools let you add stamps, drawing markups, or text-edit
comments that indicate where you want text to be added or deleted. You can paste copied
text and images into a PDF document, or attach a separate file or audio clip. Note,
however, that only files that are attached by using the Commenting toolbar are tracked
with other comments in a document review. You can change the default appearance of
comments before or after you add them. (See Changing the appearance of comments.)
Commenting and Drawing Markups toolbars A. Note tool B. Text Edit tools C. Stamp tools D.
Highlighter, Cross-Out Text, and Underline Text tools E. Attach A File As A Comment tools F.
Callout tool G. Cloud tool H. Arrow tool I. Dimensioning tool J. Text Box tool