Default (Linux).sublime-mousemap

[
	{
		"button": "button1",
		"modifiers": ["ctrl", "shift"],
		"press_command": "drag_select",
		"command": "gs_on_left_click"
	},
	{
		"button": "button2",
		"modifiers": ["ctrl", "shift"],
		"press_command": "drag_select",
		"command": "gs_on_right_click"
	}
]