the background picture can be done easily. Create a window with the size of the whole page. Your Picture should be available as SAP graphic with the correct size and resolution. You may use a BMP or TIFF6.0 format graphics file and load it with SE78.
Then use the BITMAP command in this new window like BITMAP &PHOTO& OBJECT GRAPHICS ID BMAP TYPE BMON DPI 300 .
Make a test print. We used this to print a tax form. As background picture we used the BMP Scan of the form. The variable parts are printed in some other windows on top of the background.
<b>plz dont forget to reward points if helpful</b>
Yes, it is possible to make a water-mark/ bank ground picture in SAPscript also. only this you have to do is create a new window and see the dimensions fit the entire page, call your image in this new window...
Note: all other windows that contains data/ text will not be effected.. it will be displayed on the image.