// The variable to control where the scrollview 'looks' into its child elements.
var scrollPosition : Vector2;

// The string to display inside the scrollview. 2 buttons below add & clear this string.
var longString = "This is a long-ish string";

function OnGUI () {
// Begin a scroll view. All rects are calculated automatically -
// it will use up any available screen space and make sure contents flow correctly.
// This is kept small with the last two parameters to force scrollbars to appear.
scrollPosition = GUILayout.BeginScrollView (
scrollPosition, GUILayout.Width (100), GUILayout.Height (100));

// We just add a single label to go inside the scroll view. Note how the
// scrollbars will work correctly with wordwrap.
GUILayout.Label (longString);

// Add a button to clear the string. This is inside the scroll area, so it
// will be scrolled as well. Note how the button becomes narrower to make room
// for the vertical scrollbar
if (GUILayout.Button ("Clear"))
longString = "";

// End the scrollview we began above.
GUILayout.EndScrollView ();

// Now we add a button outside the scrollview - this will be shown below
// the scrolling area.
if (GUILayout.Button ("Add More Text"))
longString += "\nHere is another line";
}

using UnityEngine;
using System.Collections;

public class example : MonoBehaviour {
public Vector2 scrollPosition;
public string longString = "This is a long-ish string";
void OnGUI() {
scrollPosition = GUILayout.BeginScrollView(scrollPosition, GUILayout.Width(100), GUILayout.Height(100));
GUILayout.Label(longString);
if (GUILayout.Button("Clear"))
longString = "";

GUILayout.EndScrollView();
if (GUILayout.Button("Add More Text"))
longString += "\nHere is another line";

}
}

import UnityEngine
import System.Collections

class example(MonoBehaviour):

public scrollPosition as Vector2

public longString as string = 'This is a long-ish string'

def OnGUI():
scrollPosition = GUILayout.BeginScrollView(scrollPosition, GUILayout.Width(100), GUILayout.Height(100))
GUILayout.Label(longString)
if GUILayout.Button('Clear'):
longString = ''
GUILayout.EndScrollView()
if GUILayout.Button('Add More Text'):
longString += '\nHere is another line'