I don't know if you have a way to reopen your discussion at https://forum.katalon.com/discussion/5990/how-to-make-full-page-screenshot
or who else could do it. But I think I have found a much better solution to your problem, which I also stumbled upon today, and would like to share it. The result is a single screenshot. Can you reopen the discussion or do we need an administrator?
Thanks + best regards