To edit a document contained within the library navigate to the “Document Management” through the “Asset Library” link on the Header Bar.
You will be presented with the following screen:

Select the document that you would like to edit by clicking on the item using the left hand mouse button. The right hand frame of the browser will be populated with a “File Details” property page containing the details of the document selected:
Enter the “Title” and a short “Description” of the document. Then click on Browse and select the file that you wish to upload to the Content Management System repository. Once selected click “Save Details” and the document will be uploaded and the left hand tree menu will be refreshed to contain the new item.

You will notice that to the right hand side of the Title
there is a preview icon
. By
clicking on this icon you can preview the document that is currently stored in
the repository.
Edit the details of the item as required. When you have completed the changes click “Save Details” and the item in the repository will be updated.