OverlayPlacement
OverlayPlacement =
"above"|"below"|"top"|"bottom"|"left"|"right"|"auto"
Defined in: dom/overlay.ts:48
Where a floating panel sits relative to its anchor. above/below are the
legacy sticky-panel values (vertical only); top/bottom/left/right pick
a specific side for point-anchored menus, and auto flips across all four to
find one that fits (else best-fit). above≡top, below≡bottom.