As our phone's screen size is quite big,some people wants smaller icon size and some more bigger.But as our phone is Temporarily unable to root,it is difficult to change the DPI,but I know a simple method which I am going to describe below:
First Drivers must be installed in your computer(Prefer windows 7)
Then download minimal ADBtool and extract on your desktop
Then install that.
Then enable phone's USB debugging (Settings - Developer options - Check USB debugging), connect that to the computer.
Open the tool just installed and check device is listed or not by " adb devices " command.
Then set the DPI value by the command " adb shell wm density 400 "
Then give " adb reboot " command
Voila!! DPI changed.Set DPI as per your wish by changing value 400 in above command.