Brush Size: If you want to make the brush larger or smaller, click the Brush Picker drop-down arrow in the Control panel, then adjust the Size slider.
Some of the settings you can adjust here include: You'll also be able to customize different settings for the Brush tool from the Control panel near the top of the screen. If you dont use the color palette module and stick to the toolbar, make sure to click on the top color (aka foreground color) to make sure your brush paints. I have tried every button I can think of but have no idea how to make the paintbrush actually work with the circle. To choose a different brush color, click the top-most color in the Color Picker Tool (this is known as the Foreground Color), then select the desired color from the dialog box. I now see a new listing altogether: Pixel, pixel, pixel and Background, instead of 'Group, Mask Curves Adjustment and Background' that I had before I used the paintbrush colour replacement tool. You can also press the B key on your keyboard to select the Brush tool at any time. Simply locate and select the Brush tool from the Tools panel, then click and drag in the document window to paint. It's easy to use the Brush tool to paint in your document. Once you know how to use the Brush tool, you'll notice that many other tools, including the Eraser and the Spot Healing Brush, use a similar group of settings. You'll also have different settings to choose from, which can help you customize it for different situations. The Brush tool allows you to paint on any layer, much like a real paintbrush.