1. Select Email > Stationery 
  2. Click Edit next to the stationery you wish to edit.
  3. Within the HTML content of the stationery, type your text for the link, e.g. View Email In Browser
  4. Highlight the text that should be the link
  5. Click the Create Link icon. (it looks like a linked chain)
  6. Select Browse Links.
  7. Select Email as the Link Type.
  8. Select View email message on web page.
  9. Click Insert.