Final answer:
The main screen in the SAP GUI is called the SAP Easy Access screen. It serves as a personalized starting point for accessing transactions and functions in SAP, tailored to user roles and permissions.
Step-by-step explanation:
The main screen within the SAP GUI is known as the SAP Easy Access screen or sometimes simply as the user menu or the SAP menu. This screen is the starting point after you log in to the SAP system and acts as the launchpad to access the various transactions and functions within SAP. It is a personalized and role-based menu consisting of transaction codes and other shortcuts that are relevant to the user's specific roles and permissions within the organization.
The SAP Easy Access screen's layout can be customized according to the user's preferences and work habits for efficient navigation. Typically, it features a menu tree on the left-hand side which allows users to browse through different categories of transactions. The screen is also consistent with the ability to bookmark frequently used transactions and generate shortcuts directly on the user's desktop. The SAP Easy Access screen is central to the user experience within SAP, as it provides a streamlined path to all resources a user may need.