Axis along which the plane is split. Mirrors vim's behavior, meaning the separator line's orientation will match that of the split. In other words, a vertical split positions the subpanes side-by-side.
Controls the proportions of the split. Values closer to 0 reduce the first pane's size, while values closer to 1 increase it.
The left or top pane, depending on the split axis.
The right or bottom pane, depending on the split axis.
Pane that displays two other panes within itself. Be careful not to create an infinitely recursing hierarchy!