Cutting, pasting, drawing, typing, and deleting are all actions that have a data component, so undoing them involves removing or replacing the affected text or image parts. Those actions that include a data component are called incremental actions.

• 剪切、粘贴、画图、键入和删除都是有数据部件的操作，所以对它们的撤销涉及删除和替换影响到的文本或图像，包含数据部件的这些操作称为“渐增操作”。