Occasionally the MathType Toolbar/Tab will from the Microsoft Word /Ribbon. Reason. When Microsoft Office Auto-update runs and installs new updates, add-ins will occasionally be disabled and in doing so, removes any Toolbar/Ribbon additions. Depending on the version of Microsoft Word you are using, this can be easily corrected.Where is the Quick Access toolbar located?
The Quick Access Toolbar is located in the upper left corner of the Word, PowerPoint, or other Office app window, just above the File tab. It lets you customize quick shortcuts for commands that you use often.