You need a make a copy option in save as. Rename it overwrites original info on original document.
In save as, you need a make a copy option of original document.
Yes I believe anything published or new idea should be secured so that others may not come along and use these original ideas as there own. Also all original phone numbers should only be allowed to use by original owners of such numbers
Wenjun Gong (MSFT Product Team) commented
Thanks for your feedback.
The Save As does make a copy of the original document and you can also give a new name to the new copy. The original document will be kept as unchanged.
Please let us know if you see any problem for Save As. Thank you and please keep posting more ideas!