I'm TRYING to export a logo. I'm not sure what the issue is. But after editing it. It keeps exporting with a white background. Is there a setting I am missing out on here? I need a transparent background.

Hello there. So this is clearly a noob question. My logo keeps exporting with a white background... I'm not sure how to export with a transparent background. Is there something I'm missing? I'm running Paintstorm on my iPad Pro... Any help would be much appreciated. This is a simple task in Photosho...