[Gimp-user] global color changes

[rich404 <forums gimpusers com>]

First turn off the active selection: Select -> None
With such a tiny image, the chequer "transparency" pattern gets in the way. Add
a layer underneath and fill with a colour. You want that anyway for a new
background.

> In looking around it seems some people use "color to alpha plugin". 
> The only problem is I can not find such a plugin....not even a grayed
> out plugin.

It is there if you look. Probably you saw some Gimp 2.8 examples, Gimp 2.10
requires the user to set transparency first. White is the default colour.

Layer -> Transparency -> Add Alpha channel then Color -> Color to Alpha. That
menu entry is down toward the bottom.

> One last request....It would be nice if I could reverse the black
> lines and make them white lines and repeat the above changes. That
> would enable me to test the pixels are not tested in the above test
> pattern.

Black lines to white lines in the layers once they have transparency. Use Color
-> Invert

some screenshot examples, https://i.imgur.com/U1hKYRa.jpg sorry this is a bit
terse, but I am packing in for the day.

rich: www.gimp-forum.net

-- 
rich404 (via www.gimpusers.com/forums)