<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <html> <head> <meta content="text/html;charset=UTF-8" http-equiv="Content-Type"> </head> <body dir="ltr" bgcolor="#ffffff" text="#000000"> When there's no alpha channel, erasing uses the background color... but that's not erasing, it's just painting another color. If background color was an image setting it would make sense but, since you can change the background color as easily as the foreground, that background/foreground widget is just a 2 colors palette. It doesn't make sense to call them "foreground" and "background". Same for the pressure thing: just choose 2 colors you want to mix in a tool setting. In real life, you can't choose a "background color" while painting. You chose it before and it stays the same during the whole work. If you want to mix 2 colors, you just choose 2 colors. There's nothing like "background" and "foreground" colors... Olivier Jeff a écrit : <blockquote cite="mid:1235079786.9910.28.camel@kusanagi" type="cite"> <meta http-equiv="Content-Type" content="text/html; "> <meta name="GENERATOR" content="GtkHTML/3.24.1.1"> Well, I can see two use cases (that bump into my face regularly in GIMP): - in some cases, erasing uses the background color - using a stylus and graphic tablet, you can use those two colors to do stuff like mixing two colors on the fly, using pressure sensitivity and other factors.</blockquote> </body> </html>