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AlanH

Backgrounds for transparent PNG export

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Transparent PNG export used to be trivial with Paintshop Pro 9 - PNG export asked what colour I wanted to be transparent, and that was sorted.

 

But I'm struggling with Affinity Photo (and Designer - I have and use both).

 

Example:

 

I have a JPG snippet of music score - black notes on white background. I simply want to invert to white notes, and export a PNG where the resultant (black) background is clear, for use as an overlay image in a video project.

 

I start with document option for transparent background checked. I can apply an Invert adjustment to get white notes on black background, but where do I go from there? I cannot find any blend options that turn the black clear, and there is no 'this colour will be transparent' option in any PNG export dialogue, as far as I can see.

 

This is such a fundamental procedure that I'm sure it must be explained somewhere but, for the life of me, I can't find it. Any ideas?

 

Thanks!

 

Alan

 

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Aha! I knew it must be simple. Had not looked at those filters - still getting used to the workflow - all a bit of a culture shock after nearly 20 years with JASC!

 

Thanks for the quick reply!

 

Alan

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