Some steering wheel control button use common Up Button Message.
You can use this option for the buttons to have common Up Button Message.

Example:
Idle Message is
Dur:0 Len: 4 sID:01 dID:50 Data:AB 00
Down Button Message is
Dur: 0 Len: 4 sID:50 dID:68 Data:3B 08
Check on Use Idle Message as Up Message

When the button is pressed and released, the messages are sent to the radio though BSGd like below.

Len: 4 sID:50 dID:68 Data:0B 08
Len: 4 sID:50 dID:68 Data:AB 00
Len: 4 sID:50 dID:68 Data:0B 08
Len: 4 sID:50 dID:68 Data:AB 00
….