Hi 
I am fairly new to NodeXL and this seems like a pretty simple problem, but I am really having a hard time.
I am working with some bibliographic citation data showing coauthorship relationships among scholars in a certain field. The file I originally imported into NodeXL was the coauthorship list (an edge list with an author name in each of the two vertex columns,
and a number in the third column indicating the number of occurrences of coauthorship).
Now, I'd like to go back and add some authors who are also in the network, but have not coauthored, as unconnected vertices to this graph. I have manually entered them into the vertices sheet, but they do not appear in the graph. When I highlight the rows
with the new unconnected vertices and try to choose Lay out again> Lay out selected vertices  that option is greyed out.
I'm guessing there is a filter (?) somewhere that is filtering out vertices with a degree of 0?
Or vertices are just being pulled from the edges list?
Hmmm.
Thanks!
