Hi Robin,

There are a lot of unknowns here regarding the exact behavior you want. But this should get you started in the right direction:

        private void ultraGrid1_InitializeLayout(object sender, Infragistics.Win.UltraWinGrid.InitializeLayoutEventArgs e)
        {
            e.Layout.ScrollBounds = ScrollBounds.ScrollToFill;
        }

        private void ultraGrid1_KeyDown(object sender, KeyEventArgs e)
        {           
            UltraGrid grid = (UltraGrid)sender;
            switch (e.KeyCode)
            {
                case Keys.PageDown:
                case Keys.PageUp:
                    UltraGridRow row = grid.ActiveRowScrollRegion.FirstRow;
                    if (row == null)
                        return;

                    while (row.Band.Index != 0)
                        row = row.ParentRow;

                    SiblingRow siblingRow = (e.KeyCode == Keys.PageDown) ? SiblingRow.Next : SiblingRow.Previous;
                    row = row.GetSibling(siblingRow, false);
                    if (row != null)
                        grid.ActiveRowScrollRegion.FirstRow = row;

                    e.Handled = true;
                    break;
            }
        }