You may click on the marked items in the lowest level of the hierarchy to retrieve. For example, the sequence data can be obtained by clicking on the gene ID and the information of enzymes, compounds, and chemical reactions by the EC number. Then you will receive the search result in the top window used for launching the hierarchical text. When multiple keywords are specified, they are taken together with AND operation. Accession and definition is the default mode used to search whole texts in the lowest level.
Accession only is used to search accessions in the lowest level.
This is useful when you know beforehand, for example, gene accessions. Headers only is used to search whole texts except the lowest level. This is used for identifying, for example, all genes in one functional category. Then you will receive the search result in a different window. In the Java version only, the user may select beforehand a set of lines by mouse clicking and dragging with the shift key down.