To relate files:

Select the files that you would like to relate (you must choose at least two files).

Click the Relate icon in the upper right-hand corner.

The files will now be related. 

There are a couple of ways to view your Related Files. The first way is to open an asset in Preview Mode. You can see all the related files at the bottom. You can select the asset to view that asset. 

Another method is to click on the Related Icon at the top left corner of an asset.

A window will appear at the bottom where you are able to view all the assets related to the selected file.

In the window, you are able to select files, unlink assets, view in list, thumbnail, masonic views, or view the asset in Preview Mode.

Note: You can only relate up to 100 files at a time.