How to see on which views an object is used

An object's 'Views' tab show on which views this object is present. In the example below we see:

1. There is 1 official BPMN view for this object (note, this only applies to object that are derived from the Archimate Business Process definition)
2. There are two other views, a BPMN one and an Archimate one

You can click on a view to open it. You can click on the 'New BPMN view button' to create a new BPMN view that uses this object as its Pool.