Office software edited file variant saves 
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A good practice to follow when developing serious work on the computer especially those kinds that may need modification or update time to time in the future is to set the output work file editted thru an appropriate software as "read-only" file after each worksession.
Setting the work file with 'read-only' attribute minimizes the possibility that accidental changes unwanted and unknown to the developer may somehow be made on the work by the developer himself, or maybe by somene else or some other thing. 


Read-only" attribute setting at "Properties" window
 for draft file of this article

Files  may  be  set  with  'read-only'  attribute   through  a  check-box  prompt  in   a "Property"   window   that  can  be   opened   for  files  displayed  through  the  "File Explorer" facility of Windows.

The developer  may  uncheck  the 'read-only'  box  before  beginning  another work session, and anytime while still working he/she may decide to save the incompleted work   through  an   option  available  at  the  work  window   of   the  development software.

The save may successfully execute and the author may then resume work.

However  in  cases  where  the  worker is  forgetful  enough  or  too  busy  and  had started  work  without  unchecking  the  'read-only'  attribute  property  for the file, forgetting  that the work  cannot be modified,  the software may still allow (or may not) development  work to  be done on  the open file  but will not  allow changes on the original work  file.  If the  work file with  'read-only'  attributes  is to be saved a prompt window may show up giving option to save the work as another file with a different name.

Various development softwares so far used by this writer may allow easy change on the 'read-only' attribute of the file while development work is in progress without closing the software nor saving the work file to another name.

Here the "File Explorer" may simply be re-opened and at the "Property" option for the file the 'read-only' box may be unchecked.

Some of these softwares with the said convenience are two softwares for webpage development: "KompoZer" and "Publisher" (in Microsoft Office), also "Paint" of the Windows OS (operating system), as well as "Notepad" of the Windows OS.

Certain softwares in Microsoft Office on the other hand may have the peculiarity that its associated work file being developed having 'read-only' property may not be so easily modified.

Here if a 'read-only' file being developed is to be saved, it seems the only available option is to save the file under a different name without changing the original file's attribute, then delete the original file and rename the new updated file to the original's name.
Some Microsoft Office softwares  with the apparently peculiar property that the writer so far encountered are "Word" (word processing"), "Excel" (spreadsheet calculation), "Access" (database development).

'Access' version 2010 or later when opened before any work is done may give warning that  the associated database file  was opened as 'read-only' and that only data in the database may be changed but not the design. The file must be closed first before a change in the 'read-only' setting takes effect.

Both 'Word' and 'Excel' have no similar warning, only preventing the saving of updated workfile to the original workfile's name. The file must also be closed first before a  change in 'read-only' setting takes effect.

The files in the image above are 'read-only' files displayed through "File Explorer" and includes some dummy work files used to verify the save characterestics of read-only files for various softwares as well as  the draft file to develop this article.

The dummy files have names prefixed with "test" and suffixed for the various respective softwares as follows... (1) .html for KompoZer  (2) .pub for Publisher (3) .jpg for Paint  (4) .txt for Notepad  (5) .docx for Word  (6) .xlsx for Excel   (7) .accdb for Access.