If you create a datagrid on the individual profile tab on the contact tab, the layout and the sorting tab criteria will be retained and used for the record display, but anything on the selection tab will be ignored. 

Records are already preselected to appear on the tab based on their idcode and additional selection logic is currently allowed.

If you create the datagrid in the regular contact window ( clip-board with a check mark icon in the upper right hand corner) and then have that datagrid sorted by idcode, you only need enter the idcode to find the records desired.