GIMP

GIMP

Line

Straight line

1. 鼠标左键 选择起始位置
2. 按住shift， 锁定
3. 松开鼠标左键， 不松shift
4. 移动到终点，点击鼠标左键

Rectangle

1. Rectangle select tools (select a region)
2. Edit -> Stroke selection -> Stroke
3. hot key:
   • R (select rectangle tools and select a region)
   • Alt+E(open edit menu board)
   • S
   • Enter