Hi, Maria.
I wish I could help you, I've been looking for the same thing. I don't think it's possible with GI out-of-the-box but has anyone created a customization that they could share that does this? Or maybe I'm wrong...is this possible?
Thanks,
Kyle
You can make it look like the header is merged by adjusting what the border looks like.... Another strategy is to place another matrix above your matrix, then you can make it look like the header.
