Here’s something cool: I noticed that DesignScience has just released MathType 6.7. I am a long-time customer of theirs. For those who do not know (or like) to use TeX scripting directly, you can use the MathType GUI to build equations in Scrivener rather easily. This post mentions it briefly.
I followed the procedure given here for using LaTeXiT, so that I can typeset using the Services menu as shown in the youtube video.
Once that is working, you must configure MathType. Inside MathType one simply goes to the “Preferences…|Translators” dialog box and specifies that copy and paste be done with “Tex – LaTeX 2.09 or later”. After this, you can copy and paste back and forth:
From MathType into Scrivener: Finish your equation with MathType GUI, copy to clipboard, paste into Scrivener. Select every line of TeX you pasted, and right-click (or control-click) and select “Services|Typeset LaTeX Text”.
From Scrivener into MathType: Select previously typeset equation, and right-click (or control-click) and select “Services|Revert Equations back to LaTeX code”. The TeX code reappears, and you can now copy it and paste it back into the MathType GUI for editing.