If the Brush Preview is not visible, choose View > Show > Brush Preview, or click the Toggle Brush Preview button at the bottom of the Brush Presets panel, as shown in Figure 4. The tip orientation (tilt and direction) and amount of wear can be seen in the Live Brush Tip Preview at upper left in your image, as shown in Figure 3. For a preview of the brush tip in action, choose the Square Charcoal in the Brush Presets panel (Window > Brush Presets). The brush tips wear down naturally as you draw, just like traditional pencils and charcoal sticks do, and they can be sharpened. With the erodible tip brushes, you can sketch realistic-looking marks. The erodible tip brushes are exciting drawing tools that debuted with Photoshop 6. The Painting workspace gives you easy access to the Brush Presets, Color, and Layers panels. When your still life is set up as you like it, launch Photoshop and choose the Painting workspace (Window > Workspace > Painting). Learn More Buy Choosing Photoshop Brushes Photoshop and Painter Artist Tablet Book, The: Creative Techniques in Digital Painting Using Wacom and the iPad, 2nd Edition

Square brushes photoshop 2020