HDMI Display Port Cable Help

Hey there, quick question! I recently purchased this cable and after a few days began to notice sometimes when i connected the cable to my TV, it became 2 different monitors and recently the connection to my TV is only displaying a bigger version of what i already see on my Macbook.  Does anyone know how to toggle between the two? thanks!

System Preferences->Displays will show the differnt options for the screen when the computer is connected to the TV

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