Using the CSS Editor
Design professionals can create branded Prezi themes using the CSS editor, which is available for customizing in a standalone editor window. Check out our video tutorial for some great tips.
The CSS Editor can be accessed via the Theme Wizard.
1. Select Customize from the top menu.
2. Click Advanced....
3. Once you have opened the Theme Wizard, select Advanced and then click Use the Prezi CSS Editor.
Prezi CSS Editor tutorial
Check out the official Prezi tutorial on using the CSS editor.