ACK KEY on a OP277 Panel

I have a little problem with the ACK key...

In the template I use an Alarm Window, with the setting Mode 'Automatic Display'.

I use it for pending alarms.

Problem I have is, the red light of the ACK KEY, I DON'T WANT THAT.

How can I disable this, that's my question.

WInCC Flexible 2005

I think it is not possible to control the behaviour of the lamp in the ACK KEY.

Make a labeling strip of absolutely non-transparant black plastic. Then noone can see the red light

You can control the ACK led if you add DP-Direct keys. If i remember correctly it overrides the usual flashing. You can also check if the user presses ack in the plc this way.