In Sublime Text 2, how do I open new files in a new tab?

Open up your user preferences file

Preferences > Settings - User

Add the following line

"open_files_in_new_window": false

Make sure you place it withint the {}as you may already have some settings in there. Make sure you add the ,after the previous setting.

Example:

{
    "color_scheme": "Packages/Color Scheme - Default/Monokai Bright.tmTheme",
    "font_size": 14.0,
    "open_files_in_new_window": false
}

OSX-Only: Add the following to Preferences > Settings - User or + , :

"open_files_in_new_window": false

This is the correct syntax i.e. use a comma...

{
    "color_scheme": "Packages/Color Scheme - Default/Monokai.tmTheme",
    "open_files_in_new_window": false
}