Keyboard Shortcuts

Shift (quick tap alone, under half a second, either side, Terrain mode only) — toggle the Raster Basemap on/off, without opening the sidebar.
Ctrl (quick tap alone, under half a second, either side, Terrain mode only) — hide every visualization mode down to just the plain basemap; tap again to restore whichever modes were on.
Space — re-toggle whichever visualization-mode checkbox you last clicked, even after a map drag has moved keyboard focus onto the map canvas.
L (hold, Terrain mode only) + drag — set the Hillshade illumination direction/altitude directly on the map instead of panning it; release L or the mouse to exit.

Ctrl + K — jump focus to the search box (geocoder) from anywhere.
Ctrl + Z / Ctrl + Shift + Z (or Ctrl + Y) — undo and redo any setting change: visualization modes, ramps, sources, split layout, the timeline date, detector thresholds. A camera move is a step only when it starts after a minute without moving, so Ctrl+Z after flying somewhere brings you back while a run of pans stays one step. Drawn features are left out, and text fields keep the browser's own text undo. Changes within 0.7 s of each other, a slider drag, count as one step.
← / → (after editing a dropdown) — cycle through that dropdown's options without reopening it.

← / → (after picking a date) — step that view's picked date one mark at a time.
Ctrl + drag (timeline handle) — also sweeps every other handle on that same side along with it, by the same number of marks.

Esc — bail out of whatever drawing tool is active (point, polygon, circle…) back to Select.

With a layer's Feature Iterator open (the loop toggle on a layer row — see Tools → Drawing), and focus outside a text field:

→ / N — frame the next feature, ← / P — the previous one (wraps around at either end).
D / Delete / Backspace — delete the currently framed feature, then frame the next one.