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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.
[[File:Htree trial modified grid Horizontal Left to Right 41.png|thumb|
left|600px|H-tree trial(5 generation(31 people shown)(Gramps 4.1.0 Windows 7)]]