You can do the same without using an image-editing program once you understand how to use Tumblr's HTML editor. Adding an image to your Tumblr blog post is as simple as clicking the "Insert Image ...

Click the "Theme" tab to access theme-specific customization options, then click the "Use Custom HTML" option. The current HTML code for your Tumblr theme will appear. Scroll through the 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.

Dimitra Zuccarelli, 26, owes her career to Tumblr, too. She joined the platform around 2009, using ... HTML work?'" SEE ALSO: Mariéme Jamme is on a mission to teach a million girls how to code ...

Remember back in the day, when you had to jerry-rig your Myspace layout with sloppy HTML in order to stand out ... which leads them to that layer of code,” Mr. Schwartz said.