Publish > Charts > Extended Family Chart
On the right hand panel is a checkbox:
__ Include All Individuals
If you have more than a few thousand individuals, this could take some time. In fact, you could run out of memory before the report is finished.
To find a person, use the Person Locator in the lower right. Married people will probably be in more than one "island" trees - their own, plus the mini-chart of each spouse.
The chart starts with a mini-chart for the Selected Person, then a separate chart for each spouse to the right, which creates more charts for each spouse in those charts, etc. There will be many mini-charts. A number in parenthesis is the "key" to that person in another mini-chart. Although you can search for that number in another mini-tree, it is quicker to use the person locator. If there are islands (ie unrelated persons) to the Selected Person, they have their own sets of "mini-charts" below the main set of charts for the selected person.