Modules are the smallest elements of the modular concept of Usine.
Generally a module contains a limited number of inlets and outlets which are predefined.
In some cases it can be useful to have total access to all available parameters of the fader. As an example: To change the color in real-time. Click on the expand button as shown below
Now the fader module will display all of the available parameters so you can connect all inlets/outlets. If you want, you can make complex or absurd patches like changing the size of a list box to the rate of the tempo!
Once a module is expanded in your patch, or even if it was too big to begin with, you can minimize it again. You have the choice to hide the inlet/outlet or just display the connected ones.
As shown above your patch editing options allow you to manage your design efficiently.