Laptop And Separate Monitor Close Laptop Can I Shut My Laptop Lid When It's Hooked To A Separate Screen?

Can I shut my laptop lid when it's hooked to a separate screen? - laptop and separate monitor close laptop

I bought my first laptop, mainly used as a desktop replacement, so I will connect the individual LCD monitor, keyboard and mouse connected. Then I close the lid on my notebook Acer TravelMate 5720, when the implementation of this kind, or overheating of the lid is closed?