Raspberry Pi - Display Resolution change

Check the supported modes using command tvservice

pi@raspberrypi:~ $ tvservice -m DMT
Group DMT has 1 modes:
           mode 4: 640x480 @ 60Hz 4:3, clock:25MHz progressive
pi@raspberrypi:~ $ tvservice -m CEA
Group CEA has 2 modes:
           mode 4: 1280x720 @ 60Hz 16:9, clock:74MHz progressive
  (prefer) mode 16: 1920x1080 @ 60Hz 16:9, clock:148MHz progressive

DMT - Monitor mode support only Mode 4

CEA - TV Mode support 4 and 16

Update same in the /boot/config.txt file

# uncomment to force a specific HDMI mode (this will force VGA)

hdmi_group=1 ### HDMI_GROUP = 1 means Group CEA for Grop DMT, the value is 2

hdmi_mode=16