// Draws a Scroll view with 2 buttons inside.
// When clicked each button it moves the scroll
// where the other button is located
var scrollPos : Vector2 = Vector2.zero;

function OnGUI () {
    scrollPos = GUI.BeginScrollView(Rect (10, 10, 100, 50), scrollPos, Rect (0, 0, 220, 10));

    if(GUI.Button (Rect (0,0,100,20), "Go Right"))
        GUI.ScrollTo(Rect (120,0,100,20));

    if(GUI.Button (Rect (120,0,100,20) , "Go Left"))
        GUI.ScrollTo(Rect (0,0,100,20));
    
    // End the scroll view that we began above.
    GUI.EndScrollView ();
}

using UnityEngine;
using System.Collections;

public class example : MonoBehaviour {
    public Vector2 scrollPos = Vector2.zero;
    void OnGUI() {
        scrollPos = GUI.BeginScrollView(new Rect(10, 10, 100, 50), scrollPos, new Rect(0, 0, 220, 10));
        if (GUI.Button(new Rect(0, 0, 100, 20), "Go Right"))
            GUI.ScrollTo(new Rect(120, 0, 100, 20));
        
        if (GUI.Button(new Rect(120, 0, 100, 20), "Go Left"))
            GUI.ScrollTo(new Rect(0, 0, 100, 20));
        
        GUI.EndScrollView();
    }
}

import UnityEngine
import System.Collections

class example(MonoBehaviour):

    public scrollPos as Vector2 = Vector2.zero

    def OnGUI():
        scrollPos = GUI.BeginScrollView(Rect(10, 10, 100, 50), scrollPos, Rect(0, 0, 220, 10))
        if GUI.Button(Rect(0, 0, 100, 20), 'Go Right'):
            GUI.ScrollTo(Rect(120, 0, 100, 20))
        if GUI.Button(Rect(120, 0, 100, 20), 'Go Left'):
            GUI.ScrollTo(Rect(0, 0, 100, 20))
        GUI.EndScrollView()