The most important administration tasks are listed for reference below:
Refresh the Logon List
Log Off User Locally
Display Details of a User
Display User Sessions
Display Technical Information for Support Purposes
Log Off User System-Wide
Change Column Overview / Change Layout
Display System-Wide Logon List
Activate User Trace with Trace Level 2
Activate User Trace with Trace Level 3
Deactivate User Trace
Display User Trace
Reset User Trace for All Files
Reset User Trace for All Work Process Files
Monitoring AS ABAP Users
Functions in the Logon List (SM04) in Detail: