Ubuntu Window Grouping

The default window grouping setting in ubuntu results in opening a separate tab, in the bottom bar, for every application running.
i.e. if you are using skype and you are talking with 3 different users you will see three different tabs in the bar.
In order to change the window grouping settings follow this steps:

1. Right click on the bottom bar, on the left (in the visible space);
2. Preferences
3. Check Always group windows