September 17th, 2019
Xcode 11 makes it easier to open new editors. You can open a new editor without switching to the Assistant Editor. Either choose File > New > Editor or click the Add Editor button in the jump bar.
Xcode defaults to adding editors to the right, stacking the editors horizontally. If you want new editors to appear below the current editor, choose File > New > Editor Below. When you do this, the menu item will change from Editor Below to Editor on Right.
Choosing View > Change Editor Orientation will toggle stacking editors vertically and horizontally.
Tags: xcode 11