I just checked the white border is on the Screen layer. Main purpose of this is to block overflow symbols from being shown outside of the main map. There is a second border also which is on the text layer. You could select each of these and delete them. Or just hide the layer.
Comments
Make sure 'crop image to aspect ratio' and 'restrict image to map border' are checked. Some templates in CC3+ require one of those to be unchecked.
There is a second border also which is on the text layer. You could select each of these and delete them. Or just hide the layer.
Thanks to everyone for the help.
Jason