| Layer | Graphics.UI.GLUT.Overlay, Graphics.UI.GLUT |
| LeftArrow | Graphics.UI.GLUT.Window, Graphics.UI.GLUT |
| LeftButton | Graphics.UI.GLUT.Callbacks.Window, Graphics.UI.GLUT.Callbacks, Graphics.UI.GLUT |
| LeftRight | Graphics.UI.GLUT.Window, Graphics.UI.GLUT |
| LeftSide | Graphics.UI.GLUT.Window, Graphics.UI.GLUT |
| LuminanceMode | Graphics.UI.GLUT.Initialization, Graphics.UI.GLUT |
| layerInUse | Graphics.UI.GLUT.Overlay, Graphics.UI.GLUT |
| leaveGameMode | Graphics.UI.GLUT.GameMode, Graphics.UI.GLUT |
| leaveMainLoop | Graphics.UI.GLUT.Begin, Graphics.UI.GLUT |
