Can i have your help to advise how to change this please
You cant they are hard coded 
BUT… theres a work around 
Unmap those entites from your ticket to remove those buttons. Then you can re-create those buttons using acions, rules and auto command buttons. Once thats done you can change the colour of the auto command button
Hi RickH,
Thank you very much for your suggestion, could i have your advise how can we modify this screen? like remove there button and recreate again please
Hi RickH,
I can create the button now, can you advise how do we put the function on it please
Do you still need to know how to do this?
Yes, could you please