When i make sigs and I the Colour Balance , it never changers the colour of my brush in the background ! Even when I select it , can somebody help me ?
Yes it is only doing it to your active layer. If your background is a separate layer, then you will need to do the same color balance to that layer as you did before.
Or simply merge the layers if you are done working on each one individually, then do the color balance and it will affect the whole layer