I want to mark up my TV screen using my laptop as im watching TV?

I am trying to create the ultimate football viewing environment. I have a Panasonic PT-ax100u projector, and I want to be able to use a laptop to highlight stuff as im watching live football. I know I need a laptop etc. that has touch screen drawing capability, but how can I get the Directv broadcast to display on my laptop and then how do I get a mark I make to be displayed through my projector?

Greetings, O giver of wondrous thanksgiving bounty! One should view various software available on the web:

http://www.fingerworkspc.com/

http://tinyurl.com/2fnc6b

http://www.chyron.com/

http://en.wikipedia.org/wiki/Telestrator

Ouchies! About $12K for HD drawing fun…

How to use a Green Screen in Sony Vegas!

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