Use the Show Selected References command to restrict the references showing in the Library window to only the selected references.
To use the Show Selected References command:
Select the references of interest (hold down the Ctrl Command key and click the references with the mouse or hold down the Shift key to select a range of references).
From the References menu, select Show Selected References. The references that you had selected will now be the only ones showing in the Library window.
After you have completed your work, select References > Show All References to display all references in the Library window.
The Hide Selected References command is similar to the Show Selected References command except that it temporarily hides the selected references in the Library window from view.
To use the Hide Selected References command:
Select the references that you want to temporarily hide.
From the References menu, select Hide Selected References.
After you have completed your work, select Show All References from the References menu to return all of the references to the Library window.