I occasionally accidentally
undock a tab from IE9 so it's in its own window (no idea what I'm doing to do this).
How do I get the window back as a tab in my main IE window?
migrated from webapps.stackexchange.com Sep 23 '11 at 7:01
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Drag the undocked tab (by the tab, not the window's title bar) so that the window disappears. Move the tab between two tabs on another IE9 window and drop it.