how to change the widget from footer to sidebar

i have the wordpress site and the widget is on the footer. how can i change it to sidebar.

http://screencast.com/t/f开发者_Go百科TBlNmZXCt8i

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Your theme should allow dropping to sidebar - which then you'd drag the widget to the sidebar. Are you building a new theme and asking how to add a sidebar which allows widgets to be dropped onto it?