When active a Shape Filter will return any records within its boundary.

 

The simplest of the shape filters is the Circle which draws a radius from a central point and returns all records within its diameter.  If a filter is unlocked, then its shape can be modified using handles.

 

A Polygon can be used to describe an irregular shaped boundary.  

When creating a Polygon points are added to a Map and it is completed by joining the last point to the first.  Once completed additional points can be added along any of the Polygons sides, this will break the first line into two more, both of which can be further subdivided.

     

A Polyline is drawn in the same way as a Polygon but the beginning and end points are not connected, this allows the Polyline to describe complex paths.  Like a Circle the Polyline will return records within a given distance.