In the Neptune notebook, I add the vertex as follow:
%%gremlin
g.addV('labelC').property(T.id, '153')
Then I do the gremlin -p v,oute,inv
option to see a visual graph representation as below. Reference: https://docs.aws.amazon.com/neptune/latest/userguide/notebooks-visualization.html
%%gremlin -p v,oute,inv
g.V().hasLabel('labelC')
However, I don't see the graph tab in the output.