Help PlayerPrefs

in my menu I have included the video settings (anti-aliasing, anistropic, etc…) and I would like that when you flip the button relating to the settings to be saved in playerprefs and then subsequently reloaded each time but do not know how to do … …
the script of my menu is this:

void OnGUI() {

GUILayout.BeginArea(new Rect(Screen.width / 2.3f,Screen.height / 2.7f,500,500));
			GUILayout.Label("Anti-Aliasing Filter");
			GUILayout.Button("           Disable");
			GUILayout.Button("               2X",);

			GUILayout.EndArea();
			}

can you tell me the script for the playerprefs?

Try this.

http://cgcookie.com/unity/2012/09/10/playerprefs/

Or do a google search on “unity3d playerprefs”.