When editing the image in the program or w/e you're using, make sure the background on the document is transparent, and when saving it, save it as a png.
When editing the image in the program or w/e you're using, make sure the background on the document is transparent, and when saving it, save it as a png.
What program are you using?
I know Photoshop has the option of making your canvas transparent the moment you start the program, or thereabouts. Post what you're using and we'll see whats up