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You can cancel the effects of up to 101 consecutive operations by choosing Undo from the Edit menu. You can undo these operations:
Adding, deleting, or moving a block
Adding, deleting, or moving a line
Adding, deleting, or moving a model annotation
Editing a block name
Creating a subsystem (see Undoing Subsystem Creation for more information)
You can reverse the effects of an Undo command by choosing Redo from the Edit menu.
![]() | Using the Model Editor | Zooming Block Diagrams | ![]() |

Learn more about Simulink through this collection of videos, articles, technical literature and the Getting Started with Simulink Guide.
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