In this task, we are going to use the CSS code simply to edit the border of a circular frame. This will give you a taste of what can be done by utilizing CSS, and how it can add something extra to your presentation design, without you needing to be a coding genius. The steps are as follows:
Click on the Customize button in the top menu bar to launch the Customize side panel. Then just like the previous two tasks, use the Advanced button to open Theme Wizard.
In the bottom left-hand corner of the wizard, there is a button labeled Advanced; ensure this is selected and you will enter the advanced theme editor just as we did in the previous task.
In the advanced editor, at the bottom of the window and located in the center, there is a link that says Use the Prezi CSS Editor, as shown in the following screenshot. Click on this link to launch the CSS editor.
After the CSS editor has opened, you can grab it and drag it with your mouse to a more comfortable reading spot...