GIMP Version: 2.6.11
Operating System: Windows
OS Version: XP - SP3
GIMP Experience: Beginner Level

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Greetings,
I have an image (with rgb & alpha channel)
that i want to make 10% opacity.
I know how to do it with a selection and then EraserTool.
But now i need to do the Whole image.
Pls, how do i do that?
Thanks...vmars316

the easiest way I've found is to float the layer, set it to the desired opacity, and then anchor it.

Just lower the opacity of the image to 10%, create a transparent layer on Top and merge down. Maybe an easier way, but this is the way I do this.

if this image has an alpha channel just make the blend mode 10% or whatever looks good. then save (probably as a png)

I just tried this now and it IS very transparent. is that what you want?

Yes but, how do i change the opacity of the image?

Thanks...vm

just read :lower the opacity of the layer to 10%

But i doubt you may like the result...would be something almost invisible if the BG is transparent and very ghostly if white

this brings up another question to me...how do you float a layer?

to do what ?
It is the selection that may be floating not a layer

OH i see.
I didn't (til now) notice that there is a 'opacity slider' on the Layers,Channels,Paths display.
I kept going to the Layers menu/Transparency/..... and scratching my head.
Thanks...vm