Is there anyway to return to default settings in Microsoft equation?

Prior to me messing around with it, I used to be able to type CTRL-g and then a letter to get a Greek letter.

I decided to try a different font, so I went menu bar item "Style", then drop-down menu item "Define", and there I was able to try different fonts.

However, then I returned them to the way they were before, now if I try, for example, to enter a Greek lambda, I do CTRL-g l, and it just gives me l instead of lambda as it did before.

I use Microsoft equation a lot, and these shortcuts (CTRL-g) save a lot of time. I sure would be thankful if anyone can tell me how to re-enable these shortcuts.