Cell area is bytes on disk. Cells are colored by the color mode
above. Each folder's pixels are subdivided among its children, so the
shape of the tree is visible in the layout.
Mouse
Hover: see full path + size in the tooltip.
Click a cell: select it; the breadcrumb lights up.
Scroll wheel while a cell is selected: move the highlight up
or down the ancestor chain.
Double-click a cell: zoom into it. Double-click a parent in
the breadcrumb to zoom back to that ancestor.
Breadcrumb (the path row)
Click a segment to focus that ancestor.
Double-click to zoom to it. The home icon on the left jumps
to the tree root.
Component toolbar
Depth: how many levels below the current zoom to draw.
+/−, or type a number. Snaps to ∞
once you reach the tree's deepest level.
Labels: show each leaf's full path from the zoom root inside
its cell, when it fits.
URL
All state (zoom / focus / theme / palette / depth …) is
serialized into the URL hash as a single JSON blob, so you can copy a
link to any view.