[Help 🙏] unable to use point-based registration algorithm (Version 4.0.1)

[Chih-Hsiang Liao (廖致翔)]

Hello everyone! I'm new to Horos and ask for help! 🙏

I want to fusion the MRI with CTA, and I use the point-based registration method. (I chose 6 points in same orders, same positions.) However, Horos won't allow me to drag the icon of either series into the other series window. So, I just can't fusion these two series.

Could anyone help? Please! 🙏