In any of your views you have the ability to show the files or file links attached to either a customer, agency or form. This makes it easy to open the files quick and right from your view.
When you either change the default view or create a custom view you need to select a column from the Files menu (show below). Depending on if you are using file folders or not select the one that has you would like to display and end in '(files)'.
The screenshot below shows the options you have in the Files menu. If you are not using file folders select the 'No folder (files)' option, if you do you can select the folder of choice that has the (files) next to it.