Parameter transactions allow you to preassign values to fields on the initial screen of a transaction.
To create a parameter transaction, use transaction SE93 (Transaction Maintenance) or the Object Navigator.
The Object Selection dialog screen appears.
The Create Transaction dialog screen appears.
The Create Parameter Transaction screen appears.
You can hide the initial screen of a parameter transaction if you have specified values for all of its fields.
Professional User Transactions are the standard transactions executed in the SAP system. An Easy Web Transaction is an ITS-based transaction, which can be executed only in the SAP GUI for HTML. You need to refer to an ITS service in order to use it.
The SAP GUI settings do not affect the transaction itself; they only inform the user what software is needed to start the transaction: SAP GUI for Windows, SAP GUI for Java or only the browser (SAP GUI for HTML).