The Filter View input field at the top left corner of the System Log enables you to narrow your search using drop-down options and search strings.
To filter the System Event logs:
Click Filter icon.
Select any filtering scheme you want. Filter on just one field or you can filter on all of them. In the General, Source and Destination fields, you can enter a partial string to filter on.
Click Accept.
OR
Click Reset to clear the filters applied.