Enable Clear List Button
Select this option to enable the Clear List button in the Instance List.
When creating your filters you need to decide whether a new search will automatically clear the contents of the instance list. If you clear the list automatically, there is no need for the Clear List button.
If you decide not to clear the list automatically, the user has the option of using multiple searches and different search criteria to build up the instance list. In this case you would enable the Clear List button so that the users can clear the list when required.
This option is only applicable when using the standard shipped instance lists. If you are using your own snap-in instance list you can enable the clear list capability by whatever means you feel is appropriate.
This property is in the Business Object Instance List/Relations tab.