Does your dashboard contain an area that is sometimes needed, but at other times simply sitting idle, consuming important real estate on your dashboard? If so, you should consider providing your users the ability to expand and collapse that area on a simple button click!
A common use case for that would be for the area that hosts the dashboard filter controls as demonstrated here:
Click on the image or follow this link to access the demonstration.
Steps on how to set this up are fully detailed here.