| AlignContent | Cross axis distribution of the lines of a wrapping container. |
| AlignItems | Cross axis alignment of items in their line. baseline lines up first text baselines in a row. |
| Edges | Box edges, as in CSS: one value for all sides, [vertical, horizontal], [top, horizontal, bottom] or [top, right, bottom, left]. |
| FlexDirection | Main axis of a container. row lays children out left to right, column top to bottom. |
| JustifyContent | Main axis distribution of the free space in a line. |
| Length | A length: pixels, a percent of the containing box ('50%') or 'auto'. |
| MeasureFunction | Measures leaf content (text, a sprite) for the space offered. Either argument is Infinity when that axis is unconstrained. Return the content size without padding. baseline is the distance from the top to the first text baseline, for alignItems: 'baseline'. |