How to edit 'column select' shortcut in Sublime text 3 portable

Question

I am a novice to Sublime text. Previously I used notepad++. I use column selection frequently. In notepad++ it comes to me handy with alt + left mouse click which I can drag up to my wished selection.

In Sublime text, it is shift + right mouse click and drag up to wished selection for Windows. I want to change it to alt + left mouse click as I have used it in notepad++. I tried searching in preferences > key bindings in sublime text. But couldn't find mouse-key mappings there. I am using portable version of Sublime text 3 on Windows.

Answer 1

Go to Preferences > Browse Packages... then create a new file called Default (Windows).sublime-mousemap in the User folder.

Insert the following:

[
    {
        "button": "button1", "modifiers": ["alt"],
        "press_command": "drag_select",
        "press_args": {"by": "columns"}
    },
    {
        "button": "button1", "modifiers": ["alt", "ctrl"],
        "press_command": "drag_select",
        "press_args": {"by": "columns", "additive": true}
    },
    {
        "button": "button1", "modifiers": ["shift", "alt"],
        "press_command": "drag_select",
        "press_args": {"by": "columns", "subtractive": true}
    },
]