How to add resolution on the monitor?

Question

linux

I have a monitor connected via VGA, when outputting xrandr, 1024x720 is selected, which does not look like it.
I want to add a resolution of 1280x1024
cvt 1280 1024 60
xrandr --newmode VGA1 .......
in general, after viewing xrandr, it (resolution) is added not to VGA1 but to DP1, in the form of lines:
DP1 disconnected
1280x1024_60.00 (0xae ) 109.0Mhz
h: width 1280 start 1368 end 1496 total 1712 skew 0 clock 63.7Khz
v: height 1024 start 1027 end 1034 total 1063 clock 59.9Khz

Answer 1

xrandr --newmode VGA1 created a modline called VGA1, you can add to the output like this:
xrandr --addmode VGA VGA1 , and apply like this:
xrandr --output VGA --mode VGA1