It is possible to open a help text corresponding to each search aspect (free search, subject heading, author, title, source, classification).
Press the button "Switch on Help" and click then in a field of the search mask: a help text to the chosen search aspect will then appear.
For the help text corresponding to the expert search press the button "Open Help Window". Then you can see a new window with information about the search aspects and their abbreviations and also about the combined search.
A special help text describes the Biblical text search. Next to the search line you find an icon “Open Help Window“.