The location of displaying sub text in Column Header cell, etc.
| DEFAULT | "default" | Follow the value specified in parent model.
In the case of ColumnHeader, it follows the value specified by GridHeader.subTextLocation. |
| NONE | "none" | Do not display. |
| LEFT | "left" | Display on the left side of main text. |
| RIGHT | "right" | Display on the right side of main text. |
| TOP | "top" | Display on the top of main text. |
| BOTTOM | "bottom" | Display on the bottom of main text. |