• Abstract
• Contents
• Operation
• Chapter 1:
  -Menu bar
• [File]
• [Edit]
• [View]
• [Image]
• [Image Info]
• [Processing]
• [Image Reduction]
• [Window]
• [Help]
• Chapter 2:
  -Tool bar
• Chapter 3:
  -Image bar
• Chapter 4:
  -Color mode
• Chapter 5:
  -Information bar
• Chapter 6:
  -Graph tool
• Chapter 7:
  -Load and Save
• Chapter 8:
  -Print
• Glossary
• References

[Edit] menu

[Undo]

This command cancels the last operation and restores the image to the previous state. This command only cancels operations that modify the image.