JodiSte

For me this colour replacement brush is not working at all. I do as described, select a colour first (white) Then select the colour replacement brush Then move over a black area, nothing. If I move over an orange area the tool turn grey and when clicking makes the orange area grey. I have not selected grey and I need the black area to turn white. This is not user friendly behaviour of an app. What do I do wrong? Please provide videos! We live in the 21st century, please