Once you have created a Landscape that you are happy with you can export it to a PNG file. This can be achieved by clicking on the "ScreenShot" tab located on the bottom of the right hand side of your page.
By clicking on the "ScreenShot" Tab, it will bring up two new Tabs.
Now click on the camera icon. This will take a snapshot of the entire landscape including your legend, title & description. The snapshot will automatically download to your computer.