Filtering on the canvas

Filters hide nodes without taking them off the canvas. They’re made by pointing at the arrangement itself; Arrange’s popover lists them as chips and takes them off.

Ways to filter

On	Do	Keeps
the ruler (Rows) or baseline (sorted Stacks)	drag along it; the pointer turns to a selection cross and a band follows	the values between where you pressed and let go (a range chip: “Year 1948 – 1960”)
a lane, wedge, island or column name	click	hides that category (chip: “Type: not Source”); click again brings it back
the same	`⌥`-click	only that category (“Type: only Concept”); again, all
a ring’s name (Rings)	click	only that ring (a range filter over its values); again, every ring
a turn’s value (Spiral)	click	only the first N, up to that value; again, everything
the answer pager’s chips	click a type chip, a Filter menu entry, or Connected to “X”	the same lane filters, and Near for the answer’s hub
the range pill on the ruler	click its ×	clears the range

Hiding the last visible lane beeps instead of emptying the canvas.

What a filter does

Filtered-out nodes stay on the canvas, unseen; the status capsule says “48 of 212 nodes · 164 filtered out”; the lane keeps a thin collapsed strip (“164 hidden”) so it can be brought back.
The layout places only what passes.
Expanding a node brings in only neighbours the filter would show. Selecting a hidden node from a list says ““X” is hidden by the canvas’s filter. Clear it under Arrange to see it.”
On an answer, the results list follows the filter and sort, and paging brings in only what’s kept (“The answer pages through only what’s kept”).
Lines whose nodes are hidden aren’t drawn.

The chips

In Arrange’s Filters section:

Type: only Concept · Type: not Source and Thinker · Kind: only Paper, Book, Talk and 2 more
Year 1948 – 1960 (a range)
Near “Entropy” (an answer’s hub)
Connected to “Entropy” (arranged around a node)

× takes one off; Show everything clears them all. The hint under them changes with the form: Drag along the ruler to keep a range. Click a lane’s name to hide it; ⌥-click to show only it. / Click a ring’s name to show only it… / Click a turn’s value to show only what’s inside it. / Drag along the baseline to keep a range…

Filters and the two canvases

Graph’s canvas keeps its arrangement between launches but not its filters. The answer canvas keeps its arrangement from one answer to the next and starts each answer unfiltered, except that “Connected to” (arrange around) is kept.