Save with the same Name
It would be Cool if we can quickly save the Document with the same Name, instead of going through Save As - and give the Same Name.
Wenjun Gong (MSFT Product Team) commented
Thanks for posting the idea.
Do you mean save the new changes for the document (original instead of a new copy)? Office Online is in auto save mode, which mean it will automatically save every change you made when you are editing online. Thus we do not have any Save button for Office Online. You don't need to click "Save As" button or Ctrl+s to do save. Office Online does that for you automatically.
Hope this helps and please let us know if you have more question or suggestion. Thanks.