How to Add a Hyperlink to a Static Picture on a Facebook Landing Page. ... you will be able to see the star symbol for the iFrame app. Click this symbol to see a box for you to enter HTML code.

To add links to your Tumblr bio, you'll need to use a simple HTML code. Tumblr doesn't give you any sort of built-in way to add links yourself, so you'll have to copy and paste the code in manually.