To insert a selectable column, use the `<tc:columnSelector/>` tag. With the `selectable` in the `<tc:sheet/>` tag, you can adjust, whether the column should show checkboxes (default) or radio button 'singleOrNone'.

Tag Library Documentation: |

The first column in this sheet contain radio buttons. After clicking the submit button, the number of the selected row is displayed in the outputfield.

    <tc:sheet value="\#{sheetController.solarList}"
        var="solarobject" selectable="singleOrNone" rows="2"
        state="\#{sheetController.sheetState}">
        <tc:columnSelector/>
        <tc:column label="Name">
          <tc:out value="\#{solarobject.name}"/>
        </tc:column>
        ...