try putting the contents of each window into a vertical stack, and then putting each stack into a Grid, where the column definitions match the widths of your original window. You’ll have to get a little fancier with the divider - I’m inserting a thin rectangle with the XAML component but you could probably do it with “Create Shape” if you wanted to. Easier to see in a definition than to explain verbally: Question.gh (52.2 KB)