THE EDGE a surface's own control line sits on, in reading order round the box.
One vocabulary for every "put this line on an edge" choice on the desk — the fader bay's
display-mode menu and the processing trace's toolbar today — because the operator learns ONE
graphical language (2026-08-04-processing-view-layout.md, Amendment 2026-09-15d: "like in
the fader bay ... left, right, top, bottom, giving an extra flexibility with a graphical
language that everybody understands"). A host that cannot draw every edge declares its own
SUBSET, like BAY_MENU_POSITIONS below — it never gets a private list.
THE EDGE a surface's own control line sits on, in reading order round the box.
One vocabulary for every "put this line on an edge" choice on the desk — the fader bay's display-mode menu and the processing trace's toolbar today — because the operator learns ONE graphical language (
2026-08-04-processing-view-layout.md, Amendment 2026-09-15d: "like in the fader bay ... left, right, top, bottom, giving an extra flexibility with a graphical language that everybody understands"). A host that cannot draw every edge declares its own SUBSET, like BAY_MENU_POSITIONS below — it never gets a private list.