drill-down

Clicking a whole opens its parts, one level at a time, while the siblings stay folded. This keeps the overview intact instead of trading it for detail, which is the trade a fully expanded tree forces. Show a marker on the closed branches so the reader knows depth exists, and keep the path from the top visible after every open.

Clicking a whole opens its parts, one level at a time, while the siblings stay folded. This keeps the overview intact instead of trading it for detail, which is the trade a fully expanded tree forces. Show a marker on the closed branches so the reader knows depth exists, and keep the path from the top visible after every open.

Example

Best when the structure is a hierarchy deeper than two levels and most readers stop at the first.