The Sheriff

Hi guys I hope you can help? I have created a signature in Affinity Photo iPad to act as a watermark and overlay this on my photographs. I have created the signature with a transparent background. I have created a signature in white and one in black. Exported them to my iPad saved them in my photos, so far so good.  However, when overlaying the PNG file the signature I’ve created in white works fine, but the black signature is not visible and just overlays as a totally transparent image? I am using Snapseed software to create a double exposure. As I say it works fine with the white signature but not the black. Am I missing something obvious? Do I need to changed any settings for exporting the black signature, it does appear fine as an image in my photos. somewhat confusing. many thanks Dave 

Thank you James that’s is most helpful.

Hi Guys, I am relaively new to photography and even newer to post processing. I have committed to Affinity Photo for my iPsd and so far I love it. I find it more user friendly than others I've tried. I have been interested in infrared photography and have captured several images using an infrared filter. I am after so advice and guidance regarding processing them in Affinity Photo on my iPad. Any assistance and guidance would be greatly appreciated, even better if anyone knows of instrucional video to help me through it. Many thanks in anticipation.