Email Templates, Email Containers, and Agreements can be host to multiple images and/or files of your choosing.
To upload an image or File:
(main menu) Email --> My Email Templates.
Edit the Email Template you wish to upload files in.
Within the template content, place your cursor where you would like the image or file link to display.
Click the blue Upload Image or File button and choose the image or file that you have saved on your computer. The image or file will upload automatically and be placed at your cursor.
Please note: Documents, such as excel spreadsheets, word docs, pdfs, and more, can all be uploaded in this fashion. Images will be inserted, and files will become links.