asterisk users - Jun 2018 - Button for call forward and button for pickup call of another extension

Hello;
I do not know if the following feature is depending on the phone (can be
configured on the phone it self) or need to be configured from asterisk itself:
Is it possible to configure general SIP Phone to have one button that can be
used as following:
By pressing on it and then entering another phone extension, then all incoming
calls for this phone will be forwarded for that extension? If someone can direct
me how to do it in Polycom, then it is good.
And another button, by pressing on it, I can enter the extension that I need to
pickup the call that is ringing at it. How?
I do not know if these features need to be configured from the Phone it self or
need to be configured from asterisk and both?
RegardsBilal
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