2021-01-25 VSCode: expand selection / duplicate selection for macOS
めちゃくちゃ忘れるVSCodeのショートカット二大巨頭。
expand selection
Keyboard Shortcut: ⌃⇧⌘← or ⌃⇧⌘→
Visual Studio Code Tips and Tricks
duplicate selection
Shift+Option+Down and Shift+OptionUp
editor - How do I duplicate a line or selection within Visual Studio Code? - Stack Overflow