Tumblr blog themes are fully customizable; you can edit your theme's HTML code to add additional scripts ... How to Stop Tumblr From Resizing Images How to Stop Tumblr From Resizing Images.

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. Adding links to your Tumblr ...