Field help (GDE) 

A transaction is used to define the entry framework for a journal. It is possible to choose the account structure to be applied, and to define a default value and a specific control for each field. The transaction is identified by an alphanumerical code of one to five characters that will be used on journal entry to select the transaction.

The STD code transaction is used to view all the journals, irrespective of the transaction of origin.
Similarly, the STDLC code transaction enables the display and/or modification of batches, irrespective of the transaction of origin.