SIP-T27/29 phones (setting) SOFT KEYS (call park)

[Shawn]

Hi Yealink:

Checking in to see if there has been any status change for this need:
Using either the SIP-T27G or SIP-T29G phones (current firmware) ...

Can we control the 4 SOFT KEYS (below the LCD screen)?
This was semi-possible back in the older firmware days (example) SIP-T22P.

Reason:
During a call (4 in-call SOFT KEYS) (transfer, Hold, Conference, More)

We would like to set one of these SOFT KEYS (to be Asterisk style CALL PARK).
Can we control the settings and change what the SOFT KEY for HOLD does?

We are speaking about the "in call" 4 SOFT KEYS (not when the phone is on hook).
We would rather have a CALL PARK button (than) a HOLD button.

Thinking about it:
It is a waste of a PFK button (when) all 4 or 5 are needed as parking orbits BLFs.

Can we control this via the .cfg file uploading process?
If you have the commands for this, thank you for information.