You are not able to create a new, empty Search Box scope group. Instead, you must create or edit an existing Search Box scope and then use the scope-configuration page to create the new group, thereby adding the selected scope to that group at the same time. To do this:
1. Go to the Search Box Scopes page for the site level at which you want to create the new scope group as described in “Search Box Settings and Inheritance”.
2. Create a new scope using the toolbar or edit an existing scope using the actions menu as described in “The Search Box Scopes Page”. This brings you to the Add/Edit/Overwrite Search Box Scope page.
3. In the Scope Group area, click on the New Group link to open a pop-up dialog for defining the new group.
Make the following settings:
ID: Enter an ID code for the group. This is only used internally. It must be unique among all scope groups and must not include any spaces. Note that if you enter the ID of a group that is already defined further down in the site hierarchy, then that group will be promoted to the current level and marked as inherited at its original level.
Name: Enter a name for the group as it should be presented on the Search Box Scopes page.
Description: Enter a short description for the group. This will help remind yourself and other administrators about the intended purpose of the group.
4. Click on OK to close the new-group window. The new group is now created an your selected scope has become a member of that group.