You can use the Formats preference to determine the applications used for viewing and editing files of a specific Documentum object type.
To set format preferences:
On the Preferences page, select the Formats tab.
In the Choose object type list, select the object type for which you want to set the format.
In the Object’s primary format list, select the file format that you want associated with this object type.
To set options for performing a read-only viewing of a file of this object type, set the following:
Format for viewing
The format designated by the file extension.
Would you like this content to appear in the web browser?
If the viewing application can be opened via a browser, you can make that the default for viewing. Selecting Yes opens the file within your browser and does not launch another application.
Application for viewing
The application used when viewing.
In the Application for editing list, select the application used when editing a file of this object type.
To save your changes, click OK.