有這么一種神器，英文叫做reference card, 中文我不知道叫什么，就作用來說，可以叫做快捷鍵一頁紙，可以打印出來，放在案頭，然后可以隨時查閱。百度不容易找到，用谷歌的話可以使用reference card作為關鍵字查找。
下面是幾個例子
Eclipse 4.6: https://github.com/pellaton/eclipse-cheatsheet/raw/master/eclipse4.6/eclipse-shortcuts-4.6.0.pdf
Intellij IDEA: https://resources.jetbrains.com/assets/products/intellij-idea/IntelliJIDEA_ReferenceCard.pdf
Emacs: https://www.gnu.org/software/emacs/refcards/pdf/refcard.pdf
Org-Mode: https://www.gnu.org/software/emacs/refcards/pdf/orgcard.pdf