Searches for the requested document info in the document properties of the PDF.
Use the Compare with field to enter (part of) the name of the document info you are looking for.
Use the operator methods equals and doesn't equal if you are looking for an exact match; use contain or doesn't contain if the entered value is just part of the document info you are looking for.
Select the Match case checkbox if you want the search to take into account the lower and upper cases of the entered value.