@atone
Thanks. This particular line of code helped me.
xrandr --newmode "1440x900_60.00" 106.50 1440 1528 1672 1904 900 903 909 934 -hsync +vsync
However, when I try to execute this line of code, I get an error.
xrandr --output HDMI-1 --mode 1920x1080_60.00
xrandr: cannot find mode 1920x1080_60.00
I don't fully understand how to execute this command, or will I fail to raise the screen resolution to the desired result?