• Always show whitespace
    go to Preferences -> Settings - user and add the following line
    "draw_white_space": "all"
  • Convert Indentation from Tabs to Space
    View -> Indentation -> Convert Indentation to Tabs / SpacesOther option is

    Go to Preferences -> Settings-user, and add below code
    {
        "tab_size": 4,
        "translate_tabs_to_spaces": false
    }
  • Column Selection
    Middle Mouse Button
  • Change Case of Word
    Ctrl + U (CMD + KU)  : Transform to Uppercase
    Ctrl + L (CMD + KL)  : Transform to Lowercase