I'd like to filter part of my tree, to be able to export only part of my tree for use by other people.
I'd like to filter everything from my grandfather from mothers-side. He has to be the endpoint. I'd like to find all related people and lines connected to him, also the grandchildren from his brother, the great-grandparents from his mother, etc. but nothing from my family of my family-lines.
How can I set up my filter to get this information?