#The H-Tree
A structured, space-efficient technique for pedigree visualization (to display ancestral trees).
The H-tree based layout can be used to display ancestral trees. This layout increases the number of displayable generations, via a symmetrically arranged structure, provides the the user with an overview that allows them to understand and navigate through the data.
https://gramps-project.org/wiki/index.php?title=Addon:HtreePedigreeView