Why when adding point using Pick'n paint module it add too many points?

[Moh_d_Al-Watary]

Operating system:Windows 10 Education
Slicer version:4.13.0-2022-02-02
Expected behavior: when adding a point using Pick’n paint module, it will add only one point in the specific area.
Actual behavior: automatically a lot of point are added (as shown in the screen shot below)!

[lassoan (Andras Lasso)]

Probably this module has not been updated to work with recent Slicer versions.

In latest Slicer versions, the Dynamic Modeler module has a new tool Select by points, which can be used instead of Pick and Paint:

New Dynamic Modeler Tool: Select by Points

[Select By Points Tool, Dynamic Modeler, 3D Slicer] Select by points tool is available on the Dynamic Modeler module since end of October 2021 Slicer Preview Release This tools allows you to create 2 types of output models from an input model, a fiducial list, a selection-distance and a selection-algorithm. One of the possible outputs is copy of the input model with selection scalars (unselected=0, selected=1) according to the selection-algorithm and selection-distance using the f…

[Moh_d_Al-Watary]

Thank you for your reply, but I still confused!
I am measuring the distance between two models of the same region but on two time different CT, so I was using Pick’ n pain (to determine the ROI), distance to distance model (to calculate the distance between the two superimposed models) and the using Mesh statistics (to export the measurements in mm)!
Now, I have loaded the models, opened the dynamic modeler: but could not use it (although seen the shared YouTube clip, still not clear)!

a second question-please-: when I have do registration of T1 and T2 CT and saved them, when I reopened them they appear like this (disoriented) so how could this be solved?

Thank you so much for valuable time and advices

Sincerely