A:Answer The included stand does not allow for vertical orientation. If using the included VESA adapter plate, page 22 of the owner's manual states, "Vertical orientation is not recommended.", with no explanation of this limitation.
There was an answer to a similar question on this model's listing on LG's website which claims: "The LG 24 inch UltraFine 4K UHD IPS Monitor with macOS Compatibility, Model # 24MD4KL is not designed to be used in portrait mode and does not have the necessary venting to rid the excess heat that is generated by flipping it into portrait mode". How these details arise known is not shared, and I am unable to locate any writing or video to verify this reasoning.