In my experience it is usually a check and see type of thing - you can open up the UI Designer from the Administration menu of the SDK and then look at Configuration Explorer:
Folder: Repository Content --> SAP_BYD_APPLICATION_UI --> area --> sub area
For example if you want to find the view all screen for CustomerInvoiceRequest - area would be crm; sub area would be cinv; and the ViewAll screens would be under CustomerInvoiceRequestOIF
OWL screens represent the overview screen you normally get when you first go into an work centre view screen.
QAF and FS would the other two types of screen you might want to modify
Hope that helps!