Tips - How to control AntiAliasing (AA) in GLScene
AntiAliasing can be found under the Buffer property, which is avalable for TGLSceneViewer, TGLFullScreenViewer, and TGLMemoryViewer.
Example:
uses GLContext;
GLSceneViewer1.Buffer.Antialiasing = aa2X;
Be aware however, if AA is forced ON/OFF in the driver panel of the OS, then applications generally can't disable/enable it.