By default, the system includes the latest markup in the revision column. However, you can you can display the latest mark up of a document as a new column in the Publication Space.
To do this go to Publication Space, Settings, Views
And change the option for Latest Revision to Do not include Markups
Turn on the Markup Column
This will then display the latest Markup in this column
To download the latest markups you can click on the download icon that appears on the row when you highlight the particular row