OK, that helped with my question, too, made some progress and was finally able to get color exchange to work somewhat - from black to turquoise color.
But I'm trying to exchange black for white. I can't get the controls to make the target color anywhere close to white. The hex 'FFFFFF' does nothing useful.
Also mostly a rookie, been using GIMP for years, at the lowest level of competence. Not a graphic designer, all the jargon mystifies me.
How can I exchange all black line drawing to all white (PNG transparent background)?
MacOS Big Sure 11.4 with GIMP 2.10
But I'm trying to exchange black for white. I can't get the controls to make the target color anywhere close to white. The hex 'FFFFFF' does nothing useful.
Also mostly a rookie, been using GIMP for years, at the lowest level of competence. Not a graphic designer, all the jargon mystifies me.
How can I exchange all black line drawing to all white (PNG transparent background)?
MacOS Big Sure 11.4 with GIMP 2.10