# Radio Button Group

**Group=###**

Associates radio button cells within the current column with a specific radio button group, so as to allow more than one group of radio buttons in a row, or even a set of related cells in the same column to form a group. ### is the group number, 0-252.  Columns without a Group= clause are assigned group 0.  Groups 253-255 are reserved for vertical groups:

| **Group** | **Description** |
|------|------|
| 255 | Entire column is a single group |
| 254 | XTF\_MLVL: Items with same immediate parent form a group |
| 253 | XFF\_MLVL: Items at same level form a group |




If the tree is not multi=level, all three of the above act like 255, i.e. only one radio button in the entire column can be selected at a time.

Note that as with horizontal groups, enforcement of the only-one-selected-per-group rule occurs only when you change a radio button during editing. It is up to the application to enforce the rules during loading and display operations.