I produce an ISO file for every project I create. That way I can cut multible DVDs as required to give to family and friends

Within the Burn tab at the top
click on the BURN symble just above the Menu layouts
click on DVD
click on the down arrow at the top (no 1). This is the section that you select the Burner you are using (some people have more than 1 burner)
this is mostly used by those you do not want to create an ISO file
click on Image Recorder
create a folder to save your ISO into
you cannot create both an ISO file and Burn a DVD at the same time (pitty though)
After the ISO file has been created it is a matter of simply locating that particular ISO file in your directories
click right and open with your particular Burner
Presto all done

Hope this helps

David