By default, the column will show editing buttons in cells only when they have the focus. This is the same behavior used by the PropertyGrid control.

This property affects only rendering of cells and do not affect appearance of editor.

If you set ShowButtons to Always, the column will display buttons on any cells that have associated lists, even if they don't have the focus.

For details on how to associate lists with cells, see the ComboList, ComboList, and DataMap properties.