[Creating alphas using PNG backgrounds]

Thank you Alfred that’s exactly what I was trying to do.  

[Creating alphas using PNG backgrounds]

Hello

I'm totally new to Affinity but have been using Serif Draw+, PagePlus and other software for several years.   I'm trying to create an alpha using a png leopard skin file to fill it.   I can't work out how to get my png into "styles" if thats what I need to do.   I figured that I could put my alpha on the background and slice it out.   Does Affinity have a slice function?  I can't find it.   Any help you can give me would be amazing.