@Markslater1970 -
Is this on a Roku TV (one with Roku capabilities built in)?
Does your Blue Ray player have any settings to choose what resolution (picture size) it will output?
Roku Community Streaming Expert
I am not a Roku employee, only a user like you. Please, no support questions via private message -- post them publicly to the Community where others may benefit as well.
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Streaming Stick 4K+ 3821 | Streaming Stick+ 3810 | TCL Roku TV 43S245/C107X