How to add custom resolution in Budgie

Hi , I have a 1440x900 monitor for my Desktop but in my Budgie there no 1440x900 setting display. The one that appear is 1600x900 and 1400x900 .
Can Anyone tell me how to add a custom display resolution in Budgie. Thank you

note :
i have tried xrandr but it failed

sudo xrandr --addmode DVI-I-0 “1440x900_60.00”
X Error of failed request: BadMatch (invalid parameter attributes)
Major opcode of failed request: 140 (RANDR)
Minor opcode of failed request: 18 (RRAddOutputMode)
Serial number of failed request: 45
Current serial number in output stream: 46