Indicates whether multiple subscripts or superscripts applying to the same character should stack (be placed one above the other as compactly as possible) or stagger (be stretched out in a line).
| Value | Meaning |
|---|
| stack | The multiple subscripts or superscripts should be placed one above the other as compactly as possible. |
| stagger | The multiple subscripts or superscripts should be stretched out in a line. |
| Restriction: This is an optional attribute; there is no default. |