When publishing a Main Recap or Charter Party, all counterparties to the fixture will be notified and they can view these documents when they login into their own accounts.
The fixture can be published either from the editor by clicking 'Save and Publish' when saving, or from the fixture overview page as illustrated below -
Publishing on Fixture Overview:
The document is editable and can be unpublished: click 'Unpublish', as illustrated below -
Unpublish: