The following preferences can be changed on the 
   Install/Update > Available
  Software Sites preference page:
| Button | Description | 
|---|---|
| Add/Edit/Remove | Add, edit or remove a software site. | 
| Test Connection | Tests to see if it is possible to connect to the selected software site. | 
| Disable/Enable | Allows a software site to be disabled so that the update system will not try to find software on the site when updating or installing software. | 
| Import/Export | Import or export the list of software sites from a file. |