OptionalalignOptionalalignOptionalanchorwhich corner or edge to sit against; center when omitted
OptionalheightOptionalmarginshrinks the bounds on every side before anchoring
Optionaloffsetextra offset after anchoring, positive right and down
OptionaloffsetOptionalwidththe placed size; the content's own size when omitted
0..1 position across the bounds, overriding the named anchor's own alignment