You can create Author profiles if you have their details. In such a case, when an Author will go to the Submission page, they will be able to choose their name from the list of Authors and straightaway proceed to provide abstarct details.
If an Author's profile is not created, then they will be able add their details and then move on to provide Abstract information.
You can create an Author's Profile by following these steps :
Login >> Submix >> Click "manage" on the Submix page >> Authors >> Click on the Green "Add Author" button