I have a lead with several documents (such as the unique contract for that lead) attached in the Attachments section of the lead record. This is a great feature for keeping all documents associated with a lead together with that record!

However, I can't figure out a simple thing. When I send an email to the lead, I often want to attach one of the attachments in the related Attachment list. The "Attach" option at the top of the Send Mail pop-up is not a link. The other options, such as Documents, Attach from Zoho Docs, and Attach from Google Drive, allow me to attach files from various places, but none of them allow me to attach any of the files I have associated with the lead's record.

How do I attach one of the files in the Attachments related list for that lead to the email I am sending to that lead?