Ubuntu elements scaled too small

1. Install xrandr.
    $ sudo apt-get update // update packages
    $ sudo apt-get install x11-xserver-utils // install package which includes xrandr
    $ xrandr – current //To see current resolution. My result is bellow:
        jo@jo:~/$ xrandr --current
        Screen 0: minimum 320 x 200, current 1920 x 1080, maximum 16384 x 16384
        eDP connected primary 1920x1080+0+0 (normal left inverted right x axis y axis) 344mm x 194mm
           1920x1080     60.00*+
           1680x1050     60.00
           1280x1024     60.00
           1440x900      60.00
           1280x800      60.00
           1280x720      60.00
           1024x768      60.00
           800x600       60.00
           640x480       60.00
        HDMI-A-0 disconnected (normal left inverted right x axis y axis)
1.2. $ xrandr --output eDP --scale 0.66x0.66
       But its ugly solution.
2. I need to change resolution to 1792x1008
2.1. calculate info
    cvt 1792 1008
    # 1600x900 59.95 Hz (CVT 1.44M9) hsync: 55.99 kHz; pclk: 118.25 MHz
    Modeline "1792x1008_60.00" 149.50 1792 1904 2088 2384 1008 1011 1016 1046 -hsync +vsync
3. Add new resolution to xrandr
    $ sudo xrandr --newmode "1792x1008_60.00" 149.50 1792 1904 2088 2384 1008 1011 1016 1046 -hsync +vsync
    $ sudo xrandr --addmode eDP 1792x1008_60.00
    Now 1600x900 added finally. You could check with xrandr
4. And finally we implement our new resolution.
    xrandr --output eDP --mode 1600x900