I accidentally typed "zh" using the Japanese IME on macOS Sierra. Surprisingly, "zh" turned into a "←" character! Why does it do this? I would have expected it to produce just "zh", like it does with other two consecutive consonants: "kr" is "kr", "mn" is "mn". Why is "zh" a left arrow?
I did some guessing and thought that the "h" must stand for 左, that's why it's a left arrow and not a right one. Then I tried "zm", thinking that it would give me a right arrow because "m" stands for 右, it didn't.
I am so confused. What does "zh" stand for? Why a left arrow? How do I do a right one?
Note: the left arrow is U+2190 "LEFTWARDS ARROW"