Thanks for your help @jeroen !
shows this folder as result “C:\Users\gaoy\AppData\Roaming\TeXmacs”. As you said that’s for additional plugins so now I put that aside.
I can successfully insert sessions of scheme/python/SymPy, but not for Graph.
As a prerequisite, I installed Graphviz under “C:\Program Files (x86)\Graphviz2.38”, but seems I need config more.
In file init-graphviz.scm, I see (:require (url-exists-in-path? “dot”)), how can I config “dot” in path? dot.exe is located here:C:\Program Files (x86)\Graphviz2.38\bin
Do I need to config more to use the graphviz plugin?
Thanks for your help in advance!