Default Help adjusting dpi

I cannot find the DPI line in build.prop. It seems like it's not even in there. I've tried using apps and they don't work. I have appsettings but I don't think I can use that for the overall DPI of the phone. Can anyone please help?

Edit: I was able to fix the issue. I had no DPI coding in build.prop so I put it in myself. I have no idea why it's not there because the phone is new and the first thing I tried was DPI edit after immediately rooting. Now I can adjust everything and app settings works.

GS5 Towel Rooted
SAMSUNG Galaxy S5 AT&T White Rooted via Towelroot
Nexus 7 SlimKAT Franco r13