How do I save as?

[strausd]

Whenever I turn in an assignment, I always take the .txt template the professor gave, and then put my stuff where it needs to go. So then when I am done, I have an edited version of the original template that I just go and click "Save as" and make that my turn in file. That way I don't save over the original template and I would always do that in TextEdit. But there is no Save as option anymore, so how do I do that? And now with autosave, every time I build on top of the original template, it changes the original file, which I definitely DON'T want to happen! How do I fix this?

EDIT: Found my answer here.