As you stated, you created a Filter and saved it, then you are trying to add it as a query on the bottom tab of a window. Have you tried creating it as a Query instead of a filter? Is there a reason you require it to be a filter, rather than a query?
Yes I am trying to make a filter to show the Assignment history of a change with specific column attributes. Just adding the Attribute Assignments does not give me the columns I want, and adding a query does not allow me to specify a Runtime value for Condition: Is Equal to: Change/id
I figured it out.
I found a document on the community Filter Training doc.
Very Helpful After reading it two or three times I figured out what I was doing wrong.
For Filter By: I was adding Module as Change Management and Business Object as Assignments.
I needed to add the BO as Change since the Filter will be added to the Change Window.