To add a hover image on a link:
  1. Go to onMessage > Content > Links
  2. Create a new Link or edit an existing link
  3. Add a hover photo
  4. Save
User-added image 

When adding a style to the link content widget on a page, the style will need to be set to allow the hover photo:
  1. Go to onMessage > Website > Main Site > Styles
  2. Select Edit across from the style 
  3. Choose the Link icon
 User-added image
4. Select the image icon in the style to edit the style for that section  
5. Then select the Hover button from the left display panel
6. Select Save

User-added image