You can assign a document to one or more Entities if you choose. That way when you are filtering your documents by Entity they will show in 2 different Entities at the same time.
If you have already uploaded the document:
· Go to the document preview.
· Below the document name and "Other Locations" field, you will find the "Entities" field. Click in the arrow to display the list.
· Check or uncheck the Entity you want to add or remove the document. If you are adding it to an Entity a small square with the color of the entity will show the in small document icon.
If you haven't uploaded the document you can use the upload button. In the step 3 you can choose the entities.