Document that images go away when they go away. Fixes #632323.
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@ -881,6 +881,24 @@ that matches for menu items labelled \code{last}, \code{active}, or
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\end{itemize}
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\end{description}
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\subsubsection{Images}
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Bitmap/Pixelmap images can be created through the subclasses of
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\class{Tkinter.Image}:
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\begin{itemize}
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\item \class{BitmapImage} can be used for X11 bitmap data.
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\item \class{PhotoImage} can be used for GIF and PPM/PGM color bitmaps.
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\end{itemize}
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Either type of image is created through either the \code{file} or the
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\code{data} option (other options are available as well).
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The image object can then be used whereever an \code{image} option is
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supported by some widget (e.g. labels, buttons, menus). In these
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cases, Tk will not keep a reference to the image. When the last Python
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reference to the image object is deleted, the image data is deleted as
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well, and Tk will display an empty box wheerever the image was used.
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\section{\module{Tix} ---
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Extension widgets for Tk}
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