18.3. Showing WarningsIn earlier versions, Word displayed warnings and alerts in message boxes that popped up on your screen. In Office 2007, Word, Excel, and PowerPoint display these warnings in a message bar that appears just below the ribbon. Often, the warning includes an Options button that lets you choose a course of action. For example, suppose you open a file that contains macros. Word shows a warning in the message bar similar to the one in Figure 18-10. The warning explains the situation: Macros have been disabled. If you click the Options button, you see additional information about the situation. In the case of the macro warning, Word tells you that it has disabled macros, most likely because the file doesn't come from one of your Trusted Publishers, or because the digital signature is invalid. You can choose to "Help protect me from unknown content," in which case Word leaves the macros disabled. Or you can choose to "enable this content" if you know the document is safe. You can choose whether or not Word shows warnings in the message bar. To change the settings go to Office Word Options Trust Center, and click Trust Center Settings to open the Trust Center box. On the left side of the Trust Center box, click Message Bar. You see two options:
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