Hello Markus,

Currently UltraGrid does not support build-in  “add a new row” feature  when grid is grouped by some column. A way to work around this  is to add  a button on the Form  when the grid is in Group By mode, which adds record  directly to your data source (you could implements some form for input data) when the user clicks it. Because the grid is bonded with the data source the changes of the source will occur in the UltraGrid too, and you should note that customer will not have any visual indication (like expanding the group and highlighted of the new added row) that the new row appears  in any of the groups.

I’ve implemented this suggestion in a simple sample, and you could run and evaluate it, please see attached zip.

I hope that this will helps you.