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TechNote #143: Last modified: 11/07/2016

MathType: an extra space is inserted after inline equations

The information in this document applies to:  

  • MathType 6.8 and later (Windows)
  • Microsoft Word 2007 and later (Windows)


When inserting an inline equation, an extra space is inserted after the equation in Word.


The space was added as a workaround to a known Microsoft issue that occurs when inline equations are the last object on a line, causing inline equations to appear raised above the baseline.


Since the inclusion of an extra space after an equation can at times have a negative effect on formatting, there is a simple registry key that can be added in order to prevent the extra space. To do so, follow the instructions below.

  1. Exit from Microsoft Word and MathType.
    • Note: To "exit" MathType means more than closing all open MathType windows. It also means exiting the MathType Server. This has nothing to do with a computer network, and is normally running when you have used MathType with Word. To check whether the MathType Server is running, look in the "Notification Area" in the lower right of  your screen, near the clock:

      MathType Server

      Click the MathType Server icon, then click Exit.
  2. Click to download the registry key to your default download location.
  3. Unzip the downloaded file. This will reveal a folder called MTW68RegFix that contains a file called WordCommands.reg. Even though the file contains the name MTW68, this is not only for MathType 6.8. This works for versions 6.8 and later.
  4. Double-click WordCommands.reg to install this registry key (depending on your version of Windows and your security settings, you may be prompted to confirm/allow this action).
  5. Note, adding this registry key will remove the workaround mentioned above, and the potential for poor baseline alignment will return.

This will eliminate the extra space inserted after an inline equation. You can edit this registry key to turn the feature on or off as required by your work processes as follows:

Note: If you followed the steps above, you do not have to follow the steps below. What follows is the process to add the space back, should you need to do so in the future.

  1. Click Start.
  2. Type regedit in the Start Search box, and then press ENTER.
  3. If you are prompted for an administrator password or for a confirmation, type the password, or click Continue.
  4. Navigate to the following registry subkey:
    • HKEY_CURRENT_USER\Software\Design Science\DSMT6\WordCommands\
  5. Located in the right pane is a string value for NoSpaceAfterInline. Edit the value as follows:
    • To include an extra space after an inline equation, value should be 0.
    • To disallow an extra space after the equation, value should be 1.

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