You can resize a brush in GIMP quickly using keyboard shortcuts and on-screen controls. Here's how:
Method 1: Keyboard Shortcuts (Most Efficient)
- Increase Brush Size: Ctrl + Alt + Scroll Wheel Up
- Decrease Brush Size: Ctrl + Alt + Scroll Wheel Down
This method provides incremental adjustments to the brush size, allowing for precise control. Keep in mind that you need to be over the image area or a toolbox dock for the scroll wheel to function as intended.
Method 2: Using the Brush Tool Options
- Select the Brush Tool: Click on the Brush Tool icon in the Toolbox (or press the 'P' key).
- Access Tool Options: Ensure the Tool Options dock is visible. If not, go to
Windows > Dockable Dialogs > Tool Options. - Adjust the Size Slider: In the Tool Options dock, you'll find a "Size" slider. Drag the slider to the left to decrease the brush size or to the right to increase it. You can also directly enter a numerical value in the size box.
Important Considerations:
- Brush Type: The resizing method works for most brush types, including standard GIMP brushes and custom brushes.
- Brush Hardness: Changing the brush size does not affect its hardness (feathering). You can adjust the hardness in the Tool Options dock as well, if the currently selected brush supports it.
- Other Parameters: Besides size, the Tool Options dock allows you to adjust other brush parameters such as aspect ratio, angle, spacing, and force (depending on the selected tool and brush).
