Welcome to the Treehouse Community

Want to collaborate on code errors? Have bugs you need feedback on? Looking for an extra set of eyes on your latest project? Get support with fellow developers, designers, and programmers of all backgrounds and skill levels here with the Treehouse Community! While you're at it, check out some resources Treehouse students have shared here.

Looking to learn something new?

Treehouse offers a seven day free trial for new students. Get access to thousands of hours of content and join thousands of Treehouse students and alumni in the community today.

Start your free trial

CSS

Natalie Lewis
Natalie Lewis
3,096 Points

Why is my header so small? The height won't change to the size I put.

1 Answer

Abbey Tipton
Abbey Tipton
16,846 Points

Hello! If you want to use a percentage with a height, the height of the parent element must be set to 100% first. In this case, that would be the body and html elements themselves. Add this to your CSS:

body, html {
  height: 100%;
}

and you will be able to set the height of your header to whatever percentage you like. I hope that helps!