Hi,
I tried the following things without success.

1) Uncomment the part concerning Dynamic Field1 in AgentTicketOverviewMedium.tt, replacing "Field1" without the name of my dynamic field
2) Added the dynamic field in  Ticket::Frontend::OverviewMedium###DynamicField with Value 1-Enabled

Result : it doesn't show on the medium view. Any ideas ?

Regards

Alexis