After performing a search on PatSnap you'll notice that some, or all of the patents in the results page have a blue dot on their left. This blue dot indicates that this document has not been opened before.
Within a workspace you have just created, every patent will have the blue dot next to it. Once that patent has been opened and looked at , the blue dot will disappear.
Opening a patent from within a Workspace will mark it as read in other Workspaces, it will also be marked as read on the results page if it matches a query in the future.
Opening a patent from the results page will not mark it as read in any of the Workspaces it has been saved in.