I just can't seem to figure this out from the UITheme examples. Can anyone give me some general pointers on building a plain old Window? I know there isn't a UI builder, but how do you control the placement of the child controls you create in the window? For example, the following will create a StandardWindow and add a button to it (in the upper left corner). Do you control placement [of the button] with LayoutFrame? How do you use LayoutFrame? | win btnOk | win := StandardWindow new. btnOk := win newButtonFor: nil action: #ok getEnabled: nil label: 'Ok' help: nil. win addMorph: btnOk . win themeChanged; openInWorld. Thank you. I am finally trying to understand how to build some typical applications without a GUI builder... Take care, Rob