I am using this application in Japanese.
Japanese has horizontal writing (top left to right) , like English, etc., and vertical writing (top right to bottom). Currently, it is very difficult to input text in vertical writing mode, so I would like you to add a ruled note for vertical writing. Also, if possible, we would appreciate it if you could add support for input mode.
Please implement this in the Goodnote Shop, even if it is sold for a fee.