The evidence type tab displays the evidence records for a particular type of evidence. Its purpose is to allow users to maintain evidence for the evidence type.
Evidence type tab is similar to active and in-edit list views, except that it is specific to one evidence type and it shows evidence records of all status'. It provides links to view and edit individual evidence records as well as link to the standard evidence object tab view.
An evidence type tab can be opened in a few different ways. One is by selecting an evidence type on evidence list (active evidence list, in-edit evidence list) the other two are by navigating to a child evidence type from a parent evidence record, and by selecting the evidence name on the Dashboard.