how can i add items in single button on sps 1000?

Have not done it for a while but from memory you associate the PLUs that you want to include with a wlu.
then when you select the key it opens a window with all associated PLUs listed

Des
August 2013

They are a great old machine. I haven't programmed multiple menus on this model but I think it was done using WLUs. Look up WLU programming in your book. If you need a programming manual, one of the users has it here:

http://the-checkout-tech.com/manuals/cashregisters/Samsung_SPS-1000_programming_manual.html

Registerman
July 2013