Show label on the Flow metaclass - Same like 'Content' visibility on 'Message flow' metaclass

[ColruytTeam]

Hello All,

Can anyone suggest :

I created a new metaclass same like 'Message Flow' metaclass.

Normally this is a metaclass which is used as a 'flow' between 2 metaclasses.

I want to display a label on its metapicture same like 'Message Flow'.

In message flow, when we fill 'Content' it is shown on the Arrow of Message flow.

I connected 'Content' metaclass to my new metaclass also I could see 'Content' dropDown on the Characteristics tab of my new metaclass but label is missing.

May be I still need to configure some where to display content(Text message) on the flow arrow.

Please see attchment of message flow metaclass with message label dispalyed.
THis is what I want to configure for my new metaclass.

Thanks in advance,
Kartik