Hi Shaolin,

You may achieve this behavior by handling BeforeSelectChange and AfterSelectChange events of the grid. In BeforeSelectChange event you have a reference to the new selection trough event arguments. You can check the new selection, and if it is containing only one cell save a reference to this cell in some private field. In AfterSelectChange event you will need to check if you have saved a reference to a cell in your private field. If so set the grid’s active cell to point to the cached value. You can use code like this:

private UltraGridCell activeCellCached = null;

private void UltraGrid1_BeforeSelectChange(object sender, BeforeSelectChangeEventArgs e)
{
    //  If the new selection is of cells get a reference to the first
    //  selected cell and assign it to the cached active cell field
    if(e.NewSelections.Cells.Count == 1)
    {
        this.activeCellCached = this.ultraGrid1.ActiveCell;
    }
}
 
private void UltraGrid1_AfterSelectChange(object sender, AfterSelectChangeEventArgs e)
{
    //  If cashed active cell is not null set the grid active cell to
    //  refer to this cached cell value
    if(this.activeCellCached != null)
    {
        this.ultraGrid1.ActiveCell = this.activeCellCached;
    }
}

Please check the attached sample where I have implement this for you and let me know if you have any additional questions.