To do this:
Go to the dashboard then click on News tab:
Click the Add News, then Document Manager.
Click on Upload.
Max file size allowed: 01.00 MB.
File extensions allowed: *.doc, *.txt, *.docx, *.xls, *.xlsx, *.pdf
Select the relevant file.
Click on Target list and select New Window.
Click on Insert, and then on Publish.