Settings made at the farm level will be available to all applications, site collections, sites and pages managed by your SharePoint installation. To make settings here, do the following:
1. Log onto the SharePoint Central Administration site.

2. Click on the Operations tab.

3. Under the Search & Preview for SharePoint heading, click on the Manage Search & Preview Modules link. The Manage Search & Preview Modules page opens.

4. Under the Search & Preview Search heading, click on the Manage Search Tabs link.

You now see the Search Tabs page at the farm level.

Note: Even at the top, farm level you will see inheritance indicators. Tabs (and other settings) shown as inherited or customized at this level are inheriting their settings from the Search & Preview factory defaults. You can think of the defaults as existing as a virtual site level immediately above the farm level. This provides a good way to handle upgrades to Search & Preview, enabling new defaults to be loaded into your system during an upgrade without affecting your configuration work so far. You can override, revert and/or deactivate any of these settings at the farm level as required, just as on other levels. See “The Search Tabs Page” for the relevant commands.

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