Compare painting tools
Foreground color is used to paint.
tools to paint on an image; select one of the tools and drag within the image to paint.
Magic Eraser to erase similary colored areas. Select tool, click and drag on the image.
Paint Bucket to fill similary colored areas. Select tool and click and drag on the image.
Gradient tool create gradual blend between multiple colors. Firstly select tool to create it.
Then click in the beginning of a gradient on the image and drag over the image till the end of the gradient.
Quick Mask mode