Create a Callout of this Intersection in a Plan view
Change the Scale of each Callout to Twice the Size
Place it on a position on a Sheet relative to the intersection of the Grids in the Sheet (This is what you posted in another topic I see?)
since you made 2 topics, where in the process above are you now? The picture of the graph is not really visible on my screen, can you share you project + graph?