Layers

The Layers window decides what is drawn over the map and in what order. It opens from the left rail and closes with Escape or a click outside; while it is open, every change applies live — the preview is the value.

The rows, top to bottom

Row	What it controls	Movable
Markers	Sources, receptors and stations over the map	No — always on top
Trajectories	The trajectory ribbon, when there is something to draw	Yes
Wind	The wind field: arrows or animated flow	Yes
Contours	The concentration layer of the chosen species	Yes
Domain info	The domain outline and its card	Yes
Base imagery	Satellite, terrain or map; there is always one	No — always at the bottom

The two ends are fixed because their tiers are: markers float over everything, the base imagery sits under everything. Only the surface paint in the middle reorders, with each row’s ▲▼ arrows. Each row has two click targets: the checkbox toggles, the body selects the row to adjust its options.

Which species you see

The window picks one species — SO₂, NO₂, PM10, PM2.5, CO — and not a scenario or a source group: those two dimensions have their own picker in the top bar and apply to the whole view, so the layer can never disagree with what the bar says.

The way back

Because changes apply live, the window has no Apply. It has three exits:

• Revert — back to exactly how everything was when the window opened, layer order included.
• Reset — stronger: back to the values published as this demo’s defaults.
• OK — does nothing but close. It exists because a settings window with no visible exit feels stuck.

Closing the window keeps the changes. None of this persists between sessions: on reload, the demo returns to its defaults.

Save as default

Whoever has author permission also sees Save as default: it turns the current setup — layers, species, wind style, scale — into what anyone opening this demo without touching anything will see. It is how a demo is left “well set” for a presentation.

→ The map · Dimensions · Legend