| Valid value | Description |
|---|
| lr-tb | Inline components and text within a line are written left-to-right. Lines and blocks are placed top-to-bottom. |
| rl-tb | Inline components and text within a line are written right-to-left. Lines and blocks are placed top-to-bottom. |
| tb-rl | Inline components and text within a line are written top-to-bottom. Lines and blocks are placed right-to-left. |
| tb-lr | Inline components and text within a line are stacked top-to-bottom. Lines and blocks are stacked left-to-right. |
| bt-lr | Inline components and text within a line are stacked bottom-to-top. Lines and blocks are stacked left-to-right. |
| bt-rl | Inline components and text within a line are stacked bottom-to-top. Lines and blocks are stacked right-to-left. |
| lr-bt | Inline components and text within a line are stacked left-to-right. Lines and blocks are stacked bottom-to-top. |
| rl-bt | Inline components and text within a line are stacked right-to-left. Lines and blocks are stacked bottom-to-top. |
| lr-alternating-rl-bt | Inline components and text within the first line are stacked left-to-right, within the second line they are stacked right-to-left; continuing in alternation. Lines and blocks are stacked bottom-to-top. |
| lr-alternating-rl-tb | Inline components and text within the first line are stacked left-to-right, within the second line they are stacked right-to-left; continuing in alternation. Lines and blocks are stacked top-to-bottom. |
| lr-inverting-rl-bt | Inline components and text within the first line are stacked left-to-right, within the second line they inverted and are stacked right-to-left; continuing in alternation. Lines and blocks are stacked bottom-to-top. |
| lr-inverting-rl-tb | Inline components and text within the first line are stacked left-to-right, within the second line they inverted and are stacked right-to-left; continuing in alternation. Lines and blocks are stacked top-to-bottom. |
| tb-lr-in-lr-pairs | Text is written in two character, left-to-right, pairs. The pairs are then stacked top-to-bottom to form a line. Lines and blocks are stacked left-to-right. |
| lr | Shorthand for lr-tb. |
| rl | Shorthand for rl-tb. |
| tb | Shorthand for tb-rl. |
| inherit | |