The chart takes a while to load.
When a tree appears in the above box, double click the tree.

After a short pause the chart will appear, using the yellow name index box an individual can be selected.
The charts are dynamic, and by selecting the various names on the chart you are able to move through the families.

Full detailed instructions for using the charts can be found by selecting the yellow question mark in the top right corner of the charts. The charts can be closed by selecting the tree in the top left corner of the page.

More detailed information about the people displayed on the chart can be found in my Royal Family Archive.
Any information you have would be most welcome.