place is the most beautiful & flexible of the [Geometry managers] supported by Tk.

http://www.purl.org/tcl/home/man/tcl8.4/TkCmd/place.html

[[Any examples of how to use it, or tips on things to do or not do?]]

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[Geometry Managers]
[Tk syntax help] - [Arts and crafts of Tcl-Tk programming] - [Category Command]