You can add comments to both your scripts, and shared scripts. Users assigned the reader role cannot view comments on shared scripts.
Comments added to shared scripts are displayed to other users only after you save the file.
To open the Comments panel, select View > Commenting Panel.
To move to the location of a comment in the document, click the Comment in the Comments panel.
To search comments, use the Search box in the Comments panel. Your search can be based on the text in the comment, or the author of the comment.
To sort comments by their chronological order, select Options > Sort By Time.
To sort comments in the order in which they appear in the document, select Options > Sort By Page Order.
To view the time the comment was posted, move your cursor over the comment. The timestamp is displayed in the tooltip.
To delete a comment, click the corresponding Delete button. The comment is deleted from the comments panel of all users. Reviewers can delete only those comments that they have posted.