Hi Heinz
I have never used
SD Concat, though it is great Mr SD created the plugins before he disappeared off the radar, shame about that.
The syntax would be:
List of Fields: #kontakt_name#||#kontakt_vorname#
Value Separator: (leave this blank as the default is a space i.e. " ")
A Note:
As far as I can tell, the field will concat the values upon saving, it will not be visible until displaying the values as content.
Bucklash