# Split View Orientation
In AppKit, [NSSplitView](https://www.gnustep.org/resources/documentation/Developer/Gui/Reference/NSSplitView.html)'s `-isVertical`/`-setVertical:` property refers to the orientation of the divider, _not_ the axis on which the views are ordered. In other words, a split view with `isVertical` equal to `YES` has a leading view (on the left in locales that read left-to-right), and vertical dividers splitting subviews that are organized horizontally. A split view with `isVertical` equal to `NO` has a top view, and horizontal dividers splitting subviews that are organized vertically.

In Renaissance, set the `isVertical` property using the `vertical` attribute in the `.gsmarkup` file: set to `YES` for vertical dividers that organize subviews left-to-right, and `NO` for horizontal dividers that organize subviews top-to-bottom.