Transparent images PNG files in Keynote
I tried to drag a PNG image file into my KeyNote presentation but the white background still there and not transparent. I thought PNG file suppose to be transparent in Keynote. Is there anyway to make the image transparent without the white background??
I am running Keynote 7.31 under High Sierra.
Thanks.
MacBook Pro, iOS 10.3.1, OS is Sierra 10.12.4