1. If you are designing an entire page, DUPLICATE this page and you can rearrange the blocks / change the content in the blocks
2. If you only need one block to copy to another page, hover over the block and you'll see a blue box appear around the block. Click the word "Block" at the top. Then click the copy icon (looks like two squares on top of each other) on the top right of the screen, by the Cancel and Save buttons. Then save the page, go to the page you want it on, and click paste.
The blocks on this page have weird background colors. That's just to show you where each block begins and ends. To change the background color, hover over the block and you'll see a blue box appear around the block. Click the word "Block" at the top. On the right sidebar, click Design and select the Background Color.