keyboard shortcuts reformat code: Ctrl + Alt + L close active editor tab: Ctrl + F4 project pane open/close (開/關檔案結構面板): Alt + 1 注意如果游標在程式碼中閃爍的話，快捷鍵可能失效，或是需要多按幾下。 terminal open/close: Alt + F12 Shift + Esc close the whole editor: Alt + F4 Documentation https://resources.jetbrains.com/storage/products/intellij-idea/docs/IntelliJIDEA_ReferenceCard.pdf