To add a view online link or to change the link text, click on the view online text in the main email window and this will open up the view online section on the right hand side of the visual editor. If there is no view online text in your email, then go straight to the preheader section, which you will usually find towards the top of the visual editor. When you open up the preheader section, Look for the section that says VIEW ONLINE. Add your text in the link text box and your url in the Link URL box. Remember to press save.