Begin an automatically laid out scrollview.

	// 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

public class Example(MonoBehaviour):

	public scrollPosition as Vector2

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

	def OnGUI() as void:
		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'