I am trying to export a map with a transparent background in QGIS (Using a slightly older version). I looked all around in the print composer but I couldn't find a place to set the background to transparent. I have already unselected the "background" box so I don't think that's it. If someone could direct me to the menu to make the background transparent, that would be great!
If you want to export the composer with transparent background it takes more than setting the map background off (or transparent). You must also change:
Composition tab - Paper and Quality box - Page background.
You can set transparency there to 100% (or other like set fill to outline only and set outline wide to 0 etc.).