one handed operation perma

Hello, i have dropped my s7 edge and damaged it. It got 2 purple and one green vertical line at the right side edge. Plus a black dot where the clock is which is at the right upper corner. At first the dot was little but now its getting bigger and i can't see the clock at all.
I want to use one handed operation all the time. Not pressing home button whenever i wake my device . Or is there a way to use assistant menu with one handed operation?
Guys help me out !

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