Hi @Des and @jb23626436,
I had this problem too, and solved it by explicitly defining scrollZoom to be true when I first declare the dcc.Graph object.
graph = dcc.Graph(
id=‘graph-geo’,
config={
‘scrollZoom’: True
}
(Apologies for the bad formatting - I created an account just to comment on this thread, so I’m still figuring out how posting works).