How to read this catalogue

The most common reason for getting lost in a catalogue is not a weak search box; it is not knowing which axis the list is organised along. This list carries three axes, and none of them substitutes for another. The main category tells you where a vehicle moves: on land, in the air or at sea. The category tree tells you what it is for. The body type tells you what shape it has.

The main category is the coarsest split, which is exactly why it narrows fastest. Tick one of the three and the list drops to roughly a third of its size. There is more on this axis in Land, air, sea: three worlds in one catalogue.

The category tree branches beneath the main category, and clicking a parent branch covers everything below it. Choose "Cars" and vehicles filed under sedan, hatchback and SUV stay in the list; picking a parent never empties the page. That behaviour is deliberate: in a tree, a parent branch is the sum of its children.

Body type works independently of the tree. A sedan and a motor yacht never sit side by side on the same body axis, yet each describes a shape within its own context. What body type does and does not tell you is a separate subject: What body type tells you, and what it does not.

All three axes can be applied at once, and all three are visible in the address bar. Once you have a filter set you like, copy the address and share it; the same address returns the same list. If you wonder why the numbers on the filter chips keep changing, Why the filter counts are context-aware explains that.