The Update Links feature allows you to update linked content including linked pictures, Excel sheets, Word documents, etc. during slide show. The Update Links feature of OfficeOne ProTools for PowerPoint is a collection of 3 buttons (or menu items). In PowerPoint 2007 and later versions, the Update Links buttons are present on the Slide Show tab:

In PowerPoint 2003 and previous versions, the Update Links menu items are present in the ProTools menu:

To configure the Update Links feature to update linked content during slide show, do the following:

1. In PowerPoint 2007 and later versions, click Update Links button on the Slide Show ribbon tab. In PowerPoint 2003 and earlier versions, click Update Linked Content during Slide Show menu item under the ProTools menu.
    
2. This will bring up the Update Links dialog box:
   
    
3. Check the Update linked content box.
4. Click OK button.

When configured this way, ProTools for PowerPoint updates linked content each time the slide is displayed. Linked content includes linked pictures, Excel sheets, Word documents, etc. For updating linked Excel file contents, your Excel workbook needs to be shared. The following table lists the steps to share your Excel workbook:

The other 2 buttons can be used as follows:

1. Update Links in Slide: Allows you to update linked content in the current slide at design time.
2. Update Links in Presentation: Allows you to update linked content in the active presentation.