Any field in the system can be marked as "searchable" which will then allow the system to search on these fields in a high performance manner as they will be automatically indexed. Any field can be searched on but without an index so slower.
Choose the menu item "Customize/Menus"
Choose "CONTROL_PANEL"
The data entry screen for the "Control panel" menu will open up
Choose a menu item, many properties of a menu item can be changed.
Supported field types include :-