All business transactions posting are stored in the Financial Accounting Modules as accounting documents.
FBV1 FBV2 FBV3 - Create/Change/Display Parked Document
Parked Document are incomplete accounting documents which are stored for later postings.
Configure the document line layouts
O7Z1 - Define line layout for document change/display
O7V1 - Select default line layout for document change/display by transaction codes.