I got a question on this too:
When you write do you usually use the horizontal way of writing (like English) or the vertical too, and with write I mean daily writing like taking notes in a class, etc.
Also, I saw a kind of paper which had a number of blanked spots and there was color outside of them (green in this case) to make it easier writing vertical (I guess one blank was for one character). So my question about it was: was it a correct observation, and do people use it? or is it for special writings?