- None of the UI elements are showing in the scene view.
- There is a bug prior to Unity 5.3, in which the UI is now visible in the Scene View.
- The UI layer is hidden.
- Update to Unity 5.3 or greater.
- If the UI Layer is hidden, un-hide it. To do so just click on the Layers dropdown to the upper right of Unity's Editor and click on the layer you wish to un-hide.
This article applies to Unity versions 5.x 5+