Some very basic stuff as an SAP system admin. Just want to keep some traces.
1. Current state
Picture to replace.
2. Add background image object
Transaction SMW0, Execute –> Execute, Add new object.
Select “Import” and upload the picture.
3. Set the object as background picture.
Transaction SM30, maintain the table SSM_CUST, set the name of the object you just created as the value for parameter “START_IMAGE”.
Log off and log on again to check the status => all done! 
