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Message: [QUOTE="Gabriel Genellina, post: 3533535"] En Sun, 06 Apr 2008 15:12:55 -0300, <skanemupp@yahoo.se> escribió: I can't help with your sizing problem, I don't know grids. But don't do this: You're creating a *new* Label object for each keystroke (they stack on the same place and only the newest is visible, I presume). Instead, you should change the text inside the existing widget: self.lbText.config(text=self.expr) (there is no need to reposition the widget) Label is described here [URL]http://effbot.org/tkinterbook/label.htm[/URL] and you may want to learn to use Tkinter variables: [URL]http://effbot.org/tkinterbook/variable.htm[/URL] [/QUOTE]