Question/Topic: How to define filter?
- On the Advanced menu click Filter.
- In the Set Filter window select fields to be used in the filter (the box on the right) from the fields list on the left.
- Define a filter criteria for the selected field. A filter criteria for each field used in the filter can be specified using 
the Edit button (select the field and click the Edit). 
Subject1 data field is selected.

A filter criteria for the 
Subject1 data field is defined. In this case 
Is EMPTY is selected.

If you want to use the same filter many times then save the filter in a filter template file. In the 
Set Filter window click the 
Save button. In the 
Save Filter As 
Template window enter a template name and click 
OK.
