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Twitter post by Daniel Feldman (@d_feldman): Linux is the only major operating system to support diagonal mode (credit [Twitter] @xssfox). Image shows an untrawide monitor rotated about 45 degrees, with a horizontal IDE window taking up a bottom triangle. A web browser and settings menu above it are organized creating a window shape almost like a stepped pyramid.
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Well now i wanna use it(probably works in linix phone?)
Linux phones aren’t supported because it’s an Xorg feature. Usually Linux phones use Wayland for the better (touch) experience. If someone wanted to they could implement it on a Wayland compositor, but given that no other OS I know of supports diagonal mode, I wouldn’t hold my breath.