How do I set the maximum window size for Microsoft Word For Mac? I can do this for individual documents. For eg. if I resize the document 'Right.doc' and open it the next time it opens at the same size but when I open a new document say 'left.doc' it opens at the old default size. 'Option + Green button' doesn't change anything and I have to manually resize the window.
RightZoom might do what you want. It is a free app that is supposedly working only up to OS X 10.9, but I have just run it on El Capitan and Yosemite and it appears to work. (I am not affiliated with the tool or its creator in any way.)
Once you maximize a document in Word, when you reopen in Word it fills the full screen.
You set a hotkey and the window fills the screen without going full screen, like in Windows. You can even limit it to one program only.
More info here: http://www.blazingtools.com/right_zoom_mac.html
Download here: http://www.blazingtools.com/downloads.html#RightZoom