Step 1 — Go to your Project Contacts
On your Project Contacts page, click the checkbox next to a Contacts name and click Message.
Step 2 — Click the paperclip
In the Messaging pop-up, click the paperclip and drag & drop a file. Then click Save.
Step 3 — Confirm and send
After attaching a file, scroll down to confirm that your file has been attached. After composing your message, click Send.