At least, support Mongolian vertical LTR display and edit.
inDesign now can display and edit CJK vertical text (right to left). but not Mongolian vertical text ( left to right ).
see indesign_mongolian_vertical_text.png.
For reference,
https://www.w3.org/TR/css-writing-modes-3/ https://w3c.github.io/mlreq/
At least, support Mongolian vertical LTR display and edit.
inDesign now can display and edit CJK vertical text (right to left). but not Mongolian vertical text ( left to right ).
see indesign_mongolian_vertical_text.png.
For reference,
https://www.w3.org/TR/css-writing-modes-3/
https://w3c.github.io/mlreq/