The family tree diagrams are displayed as 'genograms' as illustrated by the example below.
Symbols
Men are represented with a square, and women usually with a circle
A cross through the symbol indicates the individual is deceased
If the year of birth and death are known the age at death will be shown in the symbol
Conventions
In a heterosexual relationship the man is placed to the left, and the woman to the right, subsequent partners of a man are drawn to the right of the previous partner and subsequent partners for a woman are drawn to the left of the previous partner. In this way, a spouse is always be closer to his/her first partner, then the second partner (if any), third partner, and so on.In the case of ambiguity, assume a male-female relationship, rather than male-male or female-female relationship
The eldest child is placed on the far left of the parents relationship line, with younger siblings being drawn sequentially to the right
For further examples and information see also
'Introduction to the Genogram'
Navigating the Tree
The family tree may have been split into several diagrams, or 'sub-trees', to make it easier to view. The diagrams may be available in two different formats. The PDF format is best for printing or in a browser without an SVG viewer option. The SVG format is interactive. Where both formats are available a button icon is provided for switching between the formats.
When using the interactive SVG format, you can click on a person's gender symbol and it will bring up a page with their details. Clicking on a relationship line will bring up a page with that family's details.
People whose names are highlighted in blue are the links between the different diagrams - you can click on their name to navigate to the next diagram.