The screen will change to display your blog's current HTML code. Click anywhere in the code, based on where you want to add code, and press "Enter" to create a new line. Insert your HTML code.

To add links to your Tumblr bio, you'll need to use a simple HTML code, which you can copy and paste in quickly.

Converting Google Docs documents to HTML is easy. You can export documents as HTML, or use Docs to Markdown add-on from the Store to get the job done.