What I do:
1 - A column of my matrix will have the option to click on the "tab" key or "enter" and open the "Item List" in the search mode.
2 - When you select a record, is filled in the fields of my Matrix according to the selected record.
3 - In short, I want to implement a column of the matrix field of research in a SAP table. And that when you select me to capture the data from this record for the Matrix.