Individual assets can be placed on or off hold from the asset preview.  Users with appropriate permissions are able to perform a complete review of individual assets, including their attachments within the application and can take action on the asset using the accordion on the right-hand side of the window.

Within the 'Holds' section, the current state of the asset being viewed is shown.  Each asset can be on hold for any number of reasons.  Simply selecting or deselecting the desired hold reason and selecting "Save" will preserve this state.