Select a reference, then click on the button located on the bottom left corner of the detail view.
The details becomes editable, you can now fill the desired fields.
At the end of the edition, click again on the button, the reference is updated and the detail view becomes read-only again.
Double-click to edit, Double-click to save!
For a fast and efficient edition, select a reference, double-click on the detail view, edit the desired fields and double-click again to finish and save your edition!