Photoshop CS5 Quick Tip – Wicked Quik Brush Adjust
Want to adjust your brush size or hardness on the fly? Hold down the ALT/OPTION key and RIGHT-click the mouse. Dragging left/right will adjust the brush tip size while dragging up/down will adjust the hardness (fuzziness). Works with all brush-based tools; quick selecting wand, spot healing, & eraser (<= no hardness on these), Dodge, Burn, Saturate, Brush, Blur, etc.