1. Create a a new "Section". (Click on "Build" tab. Drop/Drag "Section" from left navigation bar.) 2. Create/Edit content you want in that Section (It will not show up if you need to Publish the live page). 3. When you're ready to have the section go live, "Move" entire section to the page you want it on and hit "Publish".
You can also use this page to learn & play without it showing up on the actual site. Create as many sections as you'd like. You can also delete sections as you go.