Where things are

WhereLandscape modeheader tabs and left panel buttons

Tab	Button (key)	What's there
Buildings	Buildings (B)	House, Outbuildings, Leisure
Buildings	Fences (R)	Fence, Garage, Wicket gate
Planting	Planting (G)	trees, shrubs, flower bed plants
Planting	Landscape features (E)	Rocks and boulders, Stone furniture, Rocks by the water
Water	Water (A)	Hot tubs and plunge pools, Fountains and cascades, Bowls, bird baths, springs, Watering and wells; also Pool (topic Pool)
Amenities	Small structures (K)	Playground, Barbecues and fire pits, Arches and pergolas, Raised beds and vegetable garden
Amenities	Outdoor furniture (U)	Dining area, Lounge area, Benches, Barbecue and outdoor kitchen and more
Light	Outdoor lighting (N)	Lanterns and bollards, Facade and walls, String lights and decor and more

What's important to know

A button's letter works in its own tab: G in Planting opens Planting, in Buildings it does nothing.
The catalog window is arranged like in Furnishing: groups on the left, tiles on the right, search at the top. Search finds items from other tabs too and switches the tab by itself. More in the topic Furnishing: catalog of furniture, appliances and decor.
A closed model is shown with a lock: it will open after you sign in.