How to Delete With a Swift Keyboard Shortcut in Gmail

Have you ever wondered how Chinese typewriters — mechanical typewriters for Chinese characters — could work?
Is it possible to break down the common characters into simple components, radicals or strokes which a clever mechanism can put back together again? Or were these typewriters humongous machines holding, say, 5,000 types?
In fact, Chinese typewriters resembled linotypes more than desktop typewriters, although Lin Yutang has also developed an ingenious system to select characters using "letters" for his MingKwai typewriter. Maybe we can look into that more later, but now I think it's time to return to a more recent computer keyboard and put one of its keys to good use:
›› You don't have to take your fingers off the keyboard to delete conversations in Gmail.