If you are using a Tablet PC (Tablet PC: A computer that runs Microsoft Windows XP Tablet PC Edition. With a Tablet PC, you can write directly on the screen by using a tablet pen and use the pen to perform mouse functions. Also known as a tablet computer.) and Microsoft Office Excel 2003, you can use the tablet pen (tablet pen: The pen that comes with a Tablet PC and is used to interact with the tablet screen.) to add ink annotations or drawings to worksheets. You can use ink (ink: The writing or drawing strokes made with a tablet pen or mouse.) to emphasize data in a worksheet or to add handwritten notes to the worksheet.
You can add ink anywhere in your worksheet by using ink annotations to make comments or recommendations. Ink annotations can be shown or hidden. In addition, you can use ink drawing and writing to add a permanent hand-drawn or handwritten piece of ink to a worksheet.