Pictures and videos that will help you with the main components and fine nuances of world-class serve return
Ready position
1) feet are wide apart
2) upper body leaned forward
3) racket is sitting in forehand (semi-western) grip
More examples:
Split step
1) at the exact moment the server makes a contact with the ball, split step jump has to be performed
2) feet remain wide
3) allows to quick direction change
Forehand
1) short takeback
2) lunge with the opposite foot across the body
3) early contact point
4) a little top spin
5) regular finish
Backhand