Hiding the left side menu

Is there any way to hide the left side menu? To me, it’s a complete waste of space and I’d really like to have that real estate back for viewing content. This really should be a dropdown, not a fixed menu.

I agree No idea how though (:

Also most screens are all white, suggest you use some color for the different sections and menu selections

Using an iPad here: if I rotate the iPad from landscape to portrait orientation, the left menu goes away.