If you want to add a note to multiple submissions, go to the Deal's submission list page.  Check all the funders you would like to add the note on the left side and click Add Note.  In this case Worldwide Funding and American Funding will have a note added to them.

A popup window will appear to add a Submission Status and Submission Note.  The status is not required.

Click Save and a note will appear for each of the selected funders.