Force new revision option 
Normally, if you make subsequent edits within a one hour period (configuration item 
ReplaceIfEditedAgainWithin), Foswiki will fold together your changes.  This is often the "right thing to do", as it can reduce the visual clutter of diffs.
The "Force new revision" checkbox is a way to force it to create a separate revision each time you save.
The 
preference setting FORCENEWREVISIONCHECKBOX controls whether this is checked by default or not. You can set this on site level, web level, topic level or user level.
On a related note, you can force 
every save to be a new revision number by setting 
ReplaceIfEditedAgainWithin to 
0.
Related Topics: UserDocumentationCategory, 
AdminDocumentationCategory