There are two search options in the ArkivDigital 2.0, "Archive search" and "Index search".
In Index search you can search by name, birth date, ward, etc.
In Archive search, you search among our photographed documents and there you can not search by name, birth date etc. To start researching in our documents, you need place and date of an event (birth, death or marriage) and name of the person concerned. Most common is to start with when a person is born.
A tip is to try inquire about a person on Anbytarforum, the Swedish Genealogical Association discussion forum. You can also search for the person at http://www.slaktdata.org or other types of databases such as the Demographical Database for Southern Sweden. Just be aware that these databases are not complete. All records are good as entry points in the search, but errors are inevitable. Always check what you find in the original document to authenticate what you have found.