Custom Resolutions not supported?

[mehulmpt]

My MacBook air natively supports 1280x810 resolution if I hold Options key while clicking on "Scaled Resolution" in the settings, but I cannot set 1280x810 resolution through ./screenresolution command because that resolution is not present.

How do I select a custom (but available) 16:9 resolution through terminal?

[mehulmpt]

See this question: https://stackoverflow.com/questions/48732399/cgdisplaycopyalldisplaymodes-not-returning-all-possible-screen-resolutions

[aghebert]

See this question: https://stackoverflow.com/questions/48732399/cgdisplaycopyalldisplaymodes-not-returning-all-possible-screen-resolutions

This link no longer works. Is there an alternative answer?