This FAQ will guide you where you can see all the custom dispositions and system dispositions.

From the Admin dashboard, click on Account and select Dispositions.

Under Manage Dispositions, there are 2 tabs. 

Agent Tab (Custom Disposition)

By default there are already custom dispositions on the Agent tab. You can edit them by clicking the Action button.

All disposition that you will create will be added in the Agent tab. Click here on how to create new disposition.

System tab (System Dispositions)

These are the statuses that the system will use. You cannot edit or modify any system dispositions.