To add a donate button to an email message, you must first upload the image you want to use for the button to the Image Library. Once in place: 
  1. Navigate to Email > Email Campaigns
  2. Select the Campaigns tab
  3. Search for the campaign name
  4. Click Manage under the Actions column
  5. Select the Messages tab
  6. Search for the message name
  7. Click Edit under the Actions column
  8. On the left hand navigation pane, select the HTML Content step
  9. In the WYSIWYG editor, click the icon of a tree (Insert/Edit Image)
  10. Click Browse Image Library button
  11. Select to the desired image
  12. Click Insert
  13. Highlight the image in the WYSIWYG editor
  14. Click the icon of the chains (Insert/Edit URL or Link)
  15. Click Browse Links
  16. Select Donation Form under the Link Type column
  17. Select the desired Donation Form
  18. Click Select
  19. Click Insert
  20. Click Save