[Gimp-user] Any way to set a layer to be semi transparent?

[programmer_ceds <forums gimpusers com>]

Open the Layers dialog ("Windows/Dockable Dialogs/Layers"), left-click on the
relevant layer in the Layers dialog to make it active then set the "Opacity"
field near the top of the layers dialog.

> I'm an ex Photoshop user who does astrophotography (AP).  In AP we
> frequently shoot a number of photos that we then stack in layers to
> reduce noise or create color channels.  One problem with stacking is
> that the sky may move between photos. (It's called field rotation.) 
> This can be corrected if the stack is aligned properly.  While
> Photoshop has a number of automated stitching techniques available, I
> can't find any of these in GIMP.
>
> I could manually align layers in stacks if I could reduce the
> transparency of one layer relative to the layer below it.  Is this
> possible?

-- 
programmer_ceds (via www.gimpusers.com/forums)