Keybinding alt+up won't work in Sublime Text 3

Question

I want to copy the Move Line Up/Down keyboard shortcut of VS Code to Sublime Text 3 which uses Ctrl+Up/Ctrl+Down key bindings, so I placed the following in the User-defined key-bindings file:

[
    {
        "keys": ["alt+up"], "command": "swap_line_up",
        "keys": ["alt+down"], "command": "swap_line_down"
    }
]

The swap_line_down works but the swap_line_up doesn't. I've already checked for conflicts within Default(Windows).sublime-keymap. I've tried to swap the commands to check if the problem is specific with alt+up

[
    {
        "keys": ["alt+up"], "command": "swap_line_down",
        "keys": ["alt+down"], "command": "swap_line_up"
    }
]

and, indeed, now swap_line_up works but swap_line_down doesn't. So it seems alt+up is the problem. What seems to be the issue here?

What do you see if you open the Sublime console with `View > Show Console`, enter `sublime.log_input(True)` and then press that key sequence? If the answer is "nothing", then some external program is eating the key before Sublime can see it. — OdatNurd, Dec 04 '21 at 20:20

score 3 · Accepted Answer · answered Dec 05 '21 at 02:07

Your key bindings aren't specified correctly; each binding object should have a single keys and command (and optionally a single args and context key s well), but you have both specified in a single binding.

It should look more like this:

[
    {
        "keys": ["alt+up"], "command": "swap_line_up",
    },
    {
        "keys": ["alt+down"], "command": "swap_line_down"
    },
]

Keybinding alt+up won't work in Sublime Text 3

1 Answers1