The following possibilities to specify your search request are available:

keyword	Insert one or more keywords.
all fact types	If required, limit your search to a certain fact-type (e.g. news).
filter by tags	filter your search by tags.
in fields	Here you can indicate in which fields you want to search ("all fact fields", "title fields", "creator fields").
publish date start and end	If required, limit your search to a certain period of time.
filter by language	If required, limit your search to a specific language.
show	Limit your search to published, unpublished or hidden facts.
show my facts only	Limit your search to facts which you have published.
show only unread facts	Limit your search to facts which you have not read yet.

The checkbox "save as default" allows you to save a specific search request which will be displayed every time you open the search input mask.

Click on "search" to submit your search request.