Indicates whether the Sucheinstellungen button shall be shown. Default: "Yes".
When clicking the button the dialog box Einstellungen with selected item Suche is opened.
[PARTdataManager] INDEX_SHOW_SEARCH_SETTINGS=YES/NO
Even if the button is not displayed you can reach the setting options via Extras menu -> Einstellungen... -> Suche dialog -> Allgemein tabbed page.

