Create document templates on Mac
You can use a document as a template (or “stationery”). When you open a stationery file, a copy of the original is opened. You can edit the copy and save it, and the original file remains untouched.
On your Mac, select the document you want to use as a template, then choose File > Get Info, or press Command-I.
In the General section of the Info window, select “Stationery pad.”
If you don’t see the Stationery pad checkbox or can’t select it, make sure you selected a document you can edit, and not a folder or alias. (An alias has the same name as the original file, but its icon also has a curved arrow in the lower-left corner.)
To edit the original file, follow the steps above, but deselect “Stationery pad.” Then, open the file and make your changes. After you save your changes, repeat the steps above to save the document as stationery again.