Hello Mika,
In fact this is a good question. Many times I too felt the need of having such defaults here, but never tried to have. It seems I got the answer through your question now. It is this way:
- Go to IA05 header screen (the same screen you've posted).
- Fill the values you want as Defaults
- Now go to menu System > User profile > Set data (Click on this). Soon you would find
in the status bar at the bottom of the screen.
- Job done. Next time on, whenever you come to this screen you will find these values in protected way for you.
- And to remove these defaults, use Delete Data option below the Set Data. When you click on this you get
in the status bar and the defaults are removed.
Assuming this is for individual convenience (usually), I hope this solution suits to you. If you want it for global use then, perhaps Screen-variant (SHD0) is the way. (Obviously, the above method should work for setting default values in other screens too)
Good luck
KJogeswaraRao