[autos06]

when I create a new GUI and add a new button, the button take 100% of the dialog... anyone know why ?

[kadamat]

because the frame's container probably doesn't have a useful layout manager set yet
By default, it's usually a flow layout, but jigloo may be using something else, like a gridlayout or a borderlayout
(assumign you're talking about a swing ui, not swt, don't remember if jigloo can do both)

[autos06]

Yes, swing ui