flatten image to transparent

[rich2005]

If I read your original post correctly

Quote:.. I have a png image with a transparent background.

Then it is an opened image, one layer with a transparent background

then

Quote:.. If I re-size the canvas, the only method I know to make the new image include the
expanded canvas is

using Image -> Canvas Size for a new size

   

1. original size
2. New canvas size
3. set Resize layers to All layers
4. centre or set an offset as required.

Gives the canvas, transparent background, new size.