$ xrandr
```
Screen 0: minimum 320 x 200, current 2560 x 1440, maximum 16384 x 16384
eDP-1 connected primary 2560x1440+0+0 (normal left inverted right x axis y axis) 344mm x 193mm
1366x768 60.00 +
1360x768 59.80 59.96
1280x720 60.00 59.99 59.86 59.74
1024x768 60.04 60.00
.
.
.
.
```
### Look eDP-1 "maximum 16384 x 16384 eDP-1 connected" here it is possible eDP-1 is different in yours so change it with yours
$ xrandr --output eDP-1 --mode 1500 900 # Change 1500 900 values as you want
$ cvt 1500 900
```
# 1504x900 59.90 Hz (CVT) hsync: 55.95 kHz; pclk: 111.00 MHz
Modeline "1504x900_60.00" 111.00 1504 1592 1744 1984 900 903 913 934 -hsync +vsync
```
### Copy "1504x900_60.00" 111.00 1504 1592 1744 1984 900 903 913 934 -hsync +vsync from output of `cvt 1500 900`
# xrandr --newmode PASTE_COPIED_LINE
$ xrandr --newmode "1504x900_60.00" 396.25 2880 3096 3408 3936 1620 1623 1628 1679 -hsync +vsync
# Adding
$ xrandr --addmode eDP-1 "1504x900_60.00"
## Check settings > Display > Resolution