how to add watermark in microsoft word, excel or powerpoint

hello guys
Today i will tell you how to add watermark on our document
you have need to follows this step it have two type

1. go to page layout tab
2. click in the watermark button
3. Select the watermark style as u want to show on your document 
4. click ok  

Now in your document you will see the watermarks but it is not  according to you ,..
Thanks