Re: Change screen resolution - blurry
I'm afraid you have to put it into the "Screen" section of your /etc/X11/xorg.conf. Use your distro documentation for how to do that (probably something sudo gedit /etc/X11/xorg.conf). Then restart X or reboot.
What it does is it will "trick" X and other programs into believing you have a different pixel density and most will adapt things like font and icon sizes accordingly.