Changing the placement of the tabs

You can change the placement of the tabs. The tabs for stacked views or editors can appear at the top or bottom of the area which contains them.

On the main menu bar, click Window > Preferences.
Expand the Workbench category and select Appearance.
Use the radio buttons in the Editor tab positions group or View tab positions group to control whether you want the tabs at the top or the bottom.
Click Apply or OK.
The tabs will immediately move to their new locations.