The VIEW command has been around for a while. Ever since Autodesk introduced Sheet Set Manager named views have become even more important.
In your XREF drawing(s) create views around each of your details. Name the views according to what the detail actually is. This is very important and will save you a little time later on. To create a view, type VIEW on the command line. You will see a box like this:
Type in the name of the detail, and click the “Define window” radio button to create a view box around the detail. I recommend unchecking the box next to “Save layer snapshot with view”. Repeat this for all the detail views in the drawing.
Open a sheet through Sheet Set Manager…
In the “Model Views” tab of the Sheet Set Manager palette click the plus [+] box next to your detail drawing to expand the views. Right-click on the view you want and select “Place on Sheet”.
Before you click to place your view, right-click and select a scale.
Then click to place the view on your sheet. The XREF will be automatically attached to the drawing and a viewport created at the scale you specified with the view title below.