Document won't export as transparent PDF

[ergbetbht]

Hi there, 

I'm trying to export my document with a transparent background, the transparent background box is ticked, but everytime I export as a PDF the background is filled white. 

Can someone tell me what I'm doing wrong aha?

 

Edited April 4, 2020 by ergbetbht

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[ergbetbht]

Thanks so much!! 

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