Adobe ACROBAT READER 7.0 Manual page 22

Reviewing and approving
If the creator of the PDF document assigned additional usage rights, you can review PDF
documents via email or the web. (In Mac OS, browser-based reviews are supported
through Safari.) You're provided with a Commenting toolbar and--if you're part of a
tracked review--specific instructions for opening the document, adding comments, and
returning the document to the review initiator.
You can add your comments as a file attachment, or record an audio comment if there's a
microphone connected to the computer. A new Callout tool lets you create text box
markups that point to specific areas of a PDF document. And you can group markups so
that your comments behave as a single comment. A comments tab gives you easy access
to your own and other reviewers' comments.
In the Asian (Traditional Chinese, Simplified Chinese, Japanese, and Korean) version of
Adobe Reader 7.0, you may also be invited to participate in a workflow that requires
approval from multiple branches of an organization. In this type of workflow, PDF
documents are sent to participants in sequential order. (Only users of Acrobat 7.0
Professional can organize a tracked review.)