Polycom costum park soft key

Hi if anyone can please help me with this complicated soft keys,
I wanna have a way to make a “Park soft key” that should have the type of “normal”,(so I can place it in park with one press of the button)
and when I place the call in park the key should have the type of “automata” (so I can pick up the call with one press of the button)
its a vvx 300 model

any help ill appreciate till the sky…
Thank you so much!!!