5.3. Changing brush size

All brushes have a variable size that can be changed.

You can change the brush size in several ways:

Using the Size slider in the tool options. Pencil, Paintbrush, Eraser, Airbrush, Clone, Heal, Perspective Clone, Blur/Sharpen and Dodge/Burn tools have a slider to vary the brush size.
By using the default shortcut keys for changing a tool's size:
- Decrease size by 1: [
- Increase size by 1: ]
- Decrease size by 10: {
- Increase size by 10: }
By using the default mouse scrollwheel actions for changing a tool's size:
- Decrease size by 1: Ctrl+Alt+Scrollwheel Down
- Increase size by 1: Ctrl+Alt+Scrollwheel Up
By configuring the mouse wheel behavior in the Input Controllers preferences:
1. 김프 메인창에서 파일 → 기본 설정 메뉴를 선택합니다.
2. 새로 열린 창의 왼쪽에서 입력 장치 → 입력 제어기 를 선택합니다.
3. The Additional Input Controllers preferences are displayed with two columns: Available Controllers and Active Controllers.
  
  현재 사용중인 제어기 목록에서 Main Mouse Wheel 을 더블클릭합니다.
4. The Configure Input Controller dialog opens.
  
  In the left column Event, select the entry Scroll Up.
5. Click the Edit event button (at the bottom middle of the list).
6. The Select Controller Event Action dialog opens.
  
  In the Action column, expand the tools item.
7. In the left column Action, select Tool's Size: Increase Relative, then click the OK button.
8. Now the Scroll Up event is associated with the action tools-size-increase-percent.
9. 창을 닫습니다.
10. With the same method, configure Scroll Down to be associated with Tool's Size: Decrease Relative.
11. Click the OK button of the main window of Preferences.
After these somewhat long explanations, you can use your mouse wheel to vary brush size. For example, choose the pencil tool with the Circle brush. Set the pointer in the image window, and use the mouse wheel in both directions to see the Circle shrinking or stretching.
By configuring the behavior of the Up and Down arrow keys of the keyboard:

마우스휠 때와 다른 것은 다음 몇 가지뿐입니다.
- In the column Active Controllers, double-click Main Keyboard.
- In the column Event, edit the entry Cursor Up for the first key, and Cursor Down for the second key.
- Then, use the Up and Down arrow keys of the keyboard. The result is the same as with the mouse wheel.