Saving documents in Word online to a sharepoint site.

Hello,

We are currently busy building a office 365 environment.
I created a couple sites with document place for different people with different rights.

I can't figure out how to save a document to another site/document place.

There is no 'save as' in the word online environment. But in Office 2016 ( offline ) it works well.

So the question is; 'how can I save to a different site documents or another place?'

Thank you so far,

Kind regards,
Joey Smit
MIEGroup