property Grid.ShowLockedItems as Boolean
Retrieves or sets a value that indicates whether the locked/fixed items are visible or hidden.

TypeDescription
Boolean A boolean expression that specifies whether the locked items are shown or hidden. 
A locked or fixed item is always displayed on the top or bottom side of the control no matter if the control's list is scrolled up or down. Use the ShowLockedItems property to show or hide the locked items.  Use the LockedItemCount property to add or remove items fixed/locked to the top or bottom side of the control. Use the LockedItem property to access a locked item by its position. Use the CellValue property assign a value to a cell.