Changing DPI in Android 6.0.1, System UI has stopped

Hi to all,

I am trying to up the DPI in Android 6.0.1, all things are very little in 7" screen.

The system default is 160 DPI, when I try to put 240 DPI and reboot, get this error: “Unfortunatelly, System UI has stopped” and system can not be started, continuosly apears the message “Unfortunatelly, System UI has stopped” unless select a DPI under value_200 .

I can up to 199 DPI without get the “System UI” error, but is not enough, all is very little.

Anyone pls?