Type Alias PrimitiveAnchor

PrimitiveAnchor: "chart-top" | "chart-bottom" | "primary-pane"

Where chart furniture lives, as distinct from pane furniture.

A price line belongs to a pane. A brand mark, a corner clock or a session badge belongs to the CHART: it should sit at an edge of the whole stack, and follow that edge as indicator panes come and go. chart-bottom is the common case, and it also survives maximize, which hides the other panes entirely and would otherwise take a price-pane watermark with it.

primary-pane is the third kind: furniture that describes the price, such as a symbol badge, follows the primary price pane to whatever slot it is moved to, and the pane maximized over it while it is hidden.