vscode

// How do I duplicate a line or selection within Visual Studio Code?
File > Preferences > Keyboard Shortcuts. And editing the keybindings.json
[
    {
        "key": "ctrl+d",
        "command": "editor.action.copyLinesDownAction",
        "when": "editorTextFocus"
    },
    {
        "key": "ctrl+shift+up",
        "command": "editor.action.moveLinesUpAction",
        "when": "editorTextFocus"
    },
    {
        "key": "ctrl+shift+down",
        "command": "editor.action.moveLinesDownAction",
        "when": "editorTextFocus"
    }
]