To Add a Comment to an Issue

Open the Manage Issues dialog (Drawing > Collaborate > Collaboration > Manage Issues).

Select Issue in the Type drop-down.

The list of issues in displayed in the list box.

Click on the desired issue to open it.

Select the Comments tab.

Type in your comment in the text box.

Select Add a Comment (blue '+' button).

The comment is added to the issue and listed in the comments list box.