Online, Help, Options Dialog Box
Use this page of the Options dialog box to specify what Help sources you intend to use for Help searches and F1. You can access this dialog box by selecting Options from the Tools menu, selecting the Help folder, and then selecting Online.
Clicking OK on any page in the Options dialog box saves all settings on all pages. Clicking Cancel on any page in the Options dialog box cancels all change requests on all pages.
These options affect full-text searches. By selecting or clearing a provider, you are adding or removing the provider from the search results list. The order in which providers are listed in Search these providers determines the order in which the search results for the provider are displayed on the Search page in Help.
Additional search providers might appear in the list if you have installed custom Help files.