how to fix node positions and observe edge changes.

[lishuiwkp]

Dear all,
Many thanks to the developers for your contributions to dynamic network visualization. But I have encountered some problems recently in the process of learning.
For networks in different periods, how to fix node positions and observe edge changes. See similar graphics: https://www.sciencedirect.com/science/article/pii/S0378873315301866#sec0190
Appendix A. animation in Supplementary data.

Thank you all in advance.