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TechNote #157: Last modified: 08/14/2017

Equation chapter & section breaks are visible in red type


The information in this document applies to:

 

  • MathType for Windows
  • MathType for Mac
  • Microsoft Word for Windows
  • Microsoft Word 2011 for Mac

Issue

You have several numbered MathType equations in a Word document, and the chapter/section breaks had previously been hidden; now they're visible in red text, like in this example:

equation breaks are visible


Reason

Chapter & section breaks (hereafter referred to simply as breaks) are normally specified with a font display property of "hidden". They shouldn't show up either in the document view or when printed unless you choose to display them. Sometimes the "hidden" property gets reversed, making breaks visible.

Resolving the issue

There are two things to try. We'll mention the easier method first.

Method 1: Recycle the "Show/Hide" setting

  1. Sometimes simply clicking the Show/Hide icon on Word's Home tab is all you need to do. The icon you're looking looks like this in Word 2016 for Windows: show/hide. Appearance in other versions of Word is similar.
  2. If nothing happens when you click the icon, click it again. Sometimes it takes 2 clicks to reset the visibility.
  3. If that doesn't restore the visibility of the breaks to "hidden", proceed to Method 2.

Method 2: Modify MTEquationSection style

  1. The formatting of equation breaks, both chapter breaks and section breaks, is controlled by a Word style. You've seen Word's styles, even though you may not fully use them. They're identified by names like "Normal", "Heading 1", and "Title". It's a convenient way to consistently apply formatting to a document, and proper use of styles will prevent many headaches down the road. The name of the style controlling equation breaks is MTEquationSection style. There is another associated style, named MTDisplayEquation, which is discussed in Technical Notice 156.

  2. Neither of these 2 styles will exist in the document until you insert a numbered equation or an equation break, so if you're working with a new document and you haven't yet inserted a numbered equation, do so now.

  3. (If you're using Word 2011 on a Mac, proceed to step a.) To find the MTEquationSection style and modify it, click the dialog launcher at the lower corner of the Styles group of the Home tab: dialog launcher. When you do that, you'll see the MTEquationSection style near the top of the Styles panel (screen shot on left below). If you hover the mouse over that style, you can see the complete definition for that style.

    1. If you're using a Mac, click the Manage styles icon on Word's Home tab: Manage Styles icon in Word 2011. When you do that, you'll see the MTEquationSection style near the top of the Styles panel (screen shot on the right below). If you hover the mouse over that style, you can see the complete definition for that style.

styles pane in Word 2016 styles pane in Word 2011
Styles pane in Word 2016 for Windows. Similar appearance in other versions of Word for Windows. Styles pane in Word 2011 for Mac.
  1. Click the downward-pointing triangle to the right of the MTEquationSection label, then Modify ("Modify Style..." on the Mac), and you'll have an opportunity to change the style's definition.

  2. In the lower left of the Modify Style dialog, click Format, then Font.

  3. In the Font dialog, shown below, click the box labeled Hidden so there's a checkmark in the box. Click OK, then OK again. You may close the Styles pane now if you'd like.

click the box labeled "Hidden", then click "OK"


We hope this has been helpful. As always, please let us know if you have questions about this, or if you have additional techniques that work. We'd love to hear from you.


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