Manual edit of 3D Roi

I’m looking to count nucleus in a stack image from a confocal.
I use the plugin “3D object count” and it’s working well but some mistake remains. I see the ROI in 3d with the “3D ROI manager” plugin.

I want to modify manually my 3d ROI but I didn’t find the way to do that. Anyone have any idea for this?

Thanks for helping.