How can I change my phone's resolution?

Question

I would like to change the resolution of my s4 1080x1920 to 720x1280 not the dpi but the resolution. I have root access and am on android 6.0.1. How can I do this.



I want to do this to see how much battery I can save. Usually my phone last 3 days (normal use) on my custom 7800mah battery without charing but I don't really have much use for an UHD screen so I want to see if it can last longer by lowering the resolution.


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Answer

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