Build prop editing help!

Before I start: The info. SM-G530AZ still on 4.4.4. KitKat. Rooted. Basically I was being stupid and decided to change my lcd density from 200 to 160 or 180 i cant remember when i rebooted it says "Unfortunately the process com.android.systemui has stopped" everytime i press ok 3 seconds later it comes back up nothing happens when i press the apps on the home screen the app drawer doesnt work the notification bar doesnt work. The only things ive seen work holding the power button down and changing sound.:( ive heard about adb but not sure if it will work because my phone doesnt display whenever i connect it to my computer any falshables or alternate fixes would help plz i need this

Help with editing my build.prop

Hi every one

just need to confirm from professional people here , i need to edit build.prop on my A9 device without rooting so that i could make some connection with my car screen (stupid screen accept only Samsung and LG) , Is that possible?

Galaxy Core Prime SM-G361F Help Editing img

Hi,help me guys editing img from Sammobile ? :( :confused:
Always nand write fail :( Why :(

Video procedure :

Editing Framework-res.apk

How to remove the grey lines between the tiles ?
Please reply :)
Thanks

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Editing Baseband and Hardware Version on Samsung S6

Hi everyone, I have Samsung S6 G920P but i want to replace G920P with G920I in About Phone section. I have already changed Model Number, Build Number by editing Build.pro file but unable to Edit Hardware Number and Baseband version . Help me how can i edit this ?
Thanks in Advance