Eclipse Luna Help says to "unlock the toolbar by right clicking the toolbar and selecting the Lock the Toolbars menu item." However, when I right click the toolbar, no options at all are displayed. Any ideas how to proceed?
Not really sure why it doesn't show up in the right click menu as the documentation suggests, but you can access the Lock the Toolbars command from quick access menu (CTRL+3).
However that doesn't seem to have any effect and there is and open bug report for that, so this functionality is probably currently broken.