"I really like the vertical pedigree chart. "
You can also use some of the other charts. and on those just click on a person with Right Mouse button and that will give you various options: "Select Generation", "Select Person and Ancestors" etc.
"is there a way to limit the chart to just the direct ancestors"
I don't believe so; it's the entire generation. It does give the choice of selecting ancestors, descendants with the RIght Mouse button but it's probably better to use one of the simpler charts.
You can also use some of the other charts. and on those just click on a person with Right Mouse button and that will give you various options: "Select Generation", "Select Person and Ancestors" etc.
"is there a way to limit the chart to just the direct ancestors"
I don't believe so; it's the entire generation. It does give the choice of selecting ancestors, descendants with the RIght Mouse button but it's probably better to use one of the simpler charts.