Open image in editing program such as Photoshop. Use Marquee tool to select part of image you want opaque, copy/paste that opaque portion onto new layer, lower opacity of original layer below, merge layers, FILE>Save for Web>PNG-24
Alternatively could erase portion to be faded with tool opacity w=set to 25% or such.
Last edited by waxdoc; 09-15-2012 at 10:59 PM..
Reason: add image sample