HI Manish,
Upload a white background image(for pages expect 3 & 5) and water mark image(for pages 3 & 5) using SE78.
Declare a global variable GV_BACKGROUND with default value 'WHITE_BG'.
Now, refer the snap,
Create a program logic in the main window before CAMMAND.
If sfsy-page = 3 or sfsy-page = 5.
gv_background = 'WATERMARK'.
else.
gv_background = 'WHITE_BG'.
endif.
Regards
Sreekanth