http://www.purl.org/tcl/home/man/tcl8.4/TkCmd/image.htm

Someone want to mention the [Img] extension and why it is so useful?

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See also
[Buttons with image and text]
[Images With Transparency and Plain Images]
[Reading GIF image dimensions]
[Reading JPEG image dimensions]
[Reading PNG image dimensions]
[image create photo -file ./fun.gif]
[Tk image Dos and Don'ts] -
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[Tk syntax help] - [Arts and crafts of Tcl-Tk programming] - [Category Command]