Adding an Encrypted Note to a File
When you’re ready to send a file, you may wish to add a note to the recipient. This is called an Encrypted Note.
From the Send page, after you’ve added your recipient(s), clicked Continue, then chosen your files, you can compose your note in the Encrypted Note text box.
Once done, just proceed with the normal process of sending of file.
Your recipient will be able to view your note in their SENT inbox.