Select the range of expect values (E-values) required for hits to be shown. Both a lower limit and an upper limit may be set. The upper limit (default 10) determines the statistical significance required by a hit, as expressed by an expectation value. The lower limit (default 0) can be set to exclude obvious hits that are very similar to the query. For very short queries an upper limit of 1000 or higher might be required to see any hits.