Which version are you talking about? I tried the Ctrl-Shift-F8, but it does not work in 4.7. Any way, if you can find a BC360 course, it’s described there how to change the background picture.
I thried Ctrl+Shift+F8 on 4.6C, 6.20, 6.40 it works. And here is a quote from 4.6C:
Global settings for all users:
o Change the logo in the right-hand side of the initial screen
– To put your company logo in the right-hand side of the initial
Put your picture in the database with the transaction SMW0
“Binary data” options, e.g. in “.GIF” format.
Put a record with the picture name in the key “START_IMAGE” of
the table SSM_CUST in the View maintenance transaction SM30.
– You can adjust the picture to the window size automatically or center it in the right-hand side of the initial screen
(“RESIZE_IMAGE” “YES” or “NO” in the table SSM_CUST).
– You can deactivate the picture globally so that noone sees it
with “HIDE_START_IMAGE” “YES” in the table SSM_CUST.
User-specific picture display settings are then ignored.
Pls. be aware that using background picture slows down the connection (we additionally use “low connection” setting in SAPLOGON.INI files).