Top/bottom splits look like they have a larger gap than side-by-side splits.\n\nIt looks like both panes draw their own full border, so the divider between stacked panes takes two rows: the bottom border of the top pane plus the top border of the bottom pane. Side-by-side splits feel tighter because the divider is only one column wide.\n\nCould we make stacked panes share one divider row so horizontal and vertical splits feel consistent?