Requester wants to attach additional documents in Workflow

Hi all,

we have created a workflow for our purchase requisition process. By default the purchase requisition form is attached which has to be filled out and signed by the different departments.

When starting the transaction the requester should always in addition attach the offer he got from the supplier. Unfortunately I couldn´t find a way how to attach additional documents when starting the workflow.

Does anyone has experience with this case?

Thanks a lot in advance.

Best regards

Matze