When you drop some text file[s] into the TEA window, that file[s] will open in the editor. If a file is the image, TEA inserts it into the current text document as the IMG-tag (or media object for Docbooc). It works fine with Konqueror, Gqview, etc. By drag and drop action, TEA supposes that you drop files with the encoding that you select in Preferences > Encodings > Default charset for File open.
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