// The position on of the scrolling viewport
var scrollPosition : Vector2 = Vector2.zero;

function OnGUI () {
// An absolute-positioned example: We make a scrollview that has a really large client
// rect and put it in a small rect on the screen.
scrollPosition = GUI.BeginScrollView (Rect (10,300,100,100),
scrollPosition, Rect (0, 0, 220, 200));

// Make four buttons - one in each corner. The coordinate system is defined
// by the last parameter to BeginScrollView.
GUI.Button (Rect (0,0,100,20), "Top-left");
GUI.Button (Rect (120,0,100,20), "Top-right");
GUI.Button (Rect (0,180,100,20), "Bottom-left");
GUI.Button (Rect (120,180,100,20), "Bottom-right");

// End the scroll view that we began above.
GUI.EndScrollView ();
}

using UnityEngine;
using System.Collections;

public class example : MonoBehaviour {
public Vector2 scrollPosition = Vector2.zero;
void OnGUI() {
scrollPosition = GUI.BeginScrollView(new Rect(10, 300, 100, 100), scrollPosition, new Rect(0, 0, 220, 200));
GUI.Button(new Rect(0, 0, 100, 20), "Top-left");
GUI.Button(new Rect(120, 0, 100, 20), "Top-right");
GUI.Button(new Rect(0, 180, 100, 20), "Bottom-left");
GUI.Button(new Rect(120, 180, 100, 20), "Bottom-right");
GUI.EndScrollView();
}
}

import UnityEngine
import System.Collections

class example(MonoBehaviour):

public scrollPosition as Vector2 = Vector2.zero

def OnGUI():
scrollPosition = GUI.BeginScrollView(Rect(10, 300, 100, 100), scrollPosition, Rect(0, 0, 220, 200))
GUI.Button(Rect(0, 0, 100, 20), 'Top-left')
GUI.Button(Rect(120, 0, 100, 20), 'Top-right')
GUI.Button(Rect(0, 180, 100, 20), 'Bottom-left')
GUI.Button(Rect(120, 180, 100, 20), 'Bottom-right')
GUI.EndScrollView()