Editor Defaults Pane

Simulink Editor Defaults Overview

Configure the Simulink® Editor.

These options affect the behavior of all Simulink models. The options relate to the how models appear in terms of the visual theme, the scroll wheel behavior, and the toolbar configuration.

Use classic diagram theme

Cause Simulink diagrams to appear in the Simulink Editor using the visual theme that was used in the Simulink Editor before R2012b.

If you check Use classic diagram theme, Simulink does not display content preview. For details, see Preview Content of Hierarchical Items.

Line crossing style

Change the default display for signal lines that cross. By default, straight signal lines that cross each other but are not connected display a slight gap before and after the vertical line where it intersects the horizontal line. This display style is Tunnel.

The Line Hop format shows a bend where the vertical line intersects the horizontal line. Simulink adjusts the side the bend appears on to avoid overlapping with a block icon. If having the bend on either side overlaps with a block, Simulink uses a solid line.

The None format uses solid lines. This format can provide a slight performance improvement for updating very large models. If you enable the Simulink Preferences > Editor Defaults > Use classic diagram theme preference, Simulink uses a solid line.

Scroll wheel controls zooming

Use the scroll wheel on the mouse to control zooming instead of scrolling. For more information, see Zoom and Pan Models.

Enable smart editing features

Use smart editing cues to edit a model from within the diagram, without opening separate dialog boxes. Use options based on the context of your most recent editing operations. These features include:

  • Quick insert — Add a block to a model by typing a block name.

  • Hot parameters — Enter a parameter value for a block that you add using quick insert, without opening the block parameters dialog box.

  • Tear-off block addition — Insert a complementary block from a tear-off interface of a block. For example, when you add a GoTo block, you can use a tear-off to insert a corresponding From block.

  • Marquee selection actions — Perform actions on a marquee selection (multiple selected objects in an area of a model), such as creating different kinds of subsystem from the selected blocks.

By default, these features are enabled.

File Toolbar

Specify whether to display the New/Save, the New/Open/Save, or no file toolbar.


Specify show or hide the Print toolbar.


Specify show or hide the Cut/Copy/Paste toolbar.


Specify show or hide the Undo/Redo toolbar.

Browse Back/Forward/Up

Specify show or hide the Browse Back/Forward/Up toolbar.

Library/Model Configuration/Model Explorer

Specify show or hide the Library/Model Configuration/Model Explorer toolbar.

Refresh Blocks

Specify show or hide the Refresh Blocks toolbar.

Update Diagram

Specify show or hide the Update Diagram toolbar.


Specify show or hide the Simulation toolbar.

Fast Restart

Specify show or hide the Fast Restart button on the Simulation toolbar.

Debug Model

Specify show or hide the Debug Model toolbar.

Model Advisor

Specify show or hide the Model Advisor toolbar.


Specify show or hide the Build toolbar.


Specify show or hide the Find toolbar.

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