Replying to Comments To reply to an existing comment: Do one of the following: Select a comment on the Markup pane and click Reply . Click Tools > Markup > Reply to Comment. Right-click a comment on the Markup pane and select Reply. Right-click the comment in the graphics area and select Reply. Only one active comment appears in the graphics area at one time. A new comment appears in a threaded discussion with the original comment. Add markups elements in the graphics area. When you reply to a comment in a drawing, the markup elements for all comments retain their original color. When you reply to a comment in a model, the markup elements for the original comment turn gray or a color specified in Tools > Options . Parent topicComments Overview Setting Comment Properties Adding Comments Saving Comments Editing Comments Changing Fonts Options Dialog Box - Markup Tab