P: Ability to turn off Focus Points in Live View (Tethering)

May I search for help about LR tethering shoot on live view? When I use a manual focus lens like Canon TSE-90mm,it would be the screen as attached. Using auto focus lens but transfer to manual focus has the same situation as well. Turnning back to auto,it will disappear. What could I do to turn the focus point screen off?

My camera is Canon 5D SR , almost using manual lenses such like TSE series.

Thank you so much!

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