[Elecraft] Configure to send CW in SSB mode?

[Mike Dodd]

I just received a used K3 as a backup rig (had a K3s before the K4).

The manual says, and I know 5his to be true, "You can transmit in CW 
when SSB mode is selected by just hitting the key or paddle."

But when I hit my key in LSB mode, no CW is transmitted. Is there a 
CONFIG or MENU item I need to set to enable this?

The K3 Utility says this K3 is up-to-date on all firmware releases.

Thanks for any/all pointers.

73, Mike N4CF