The "/finfo" page:

URL: /finfo?name=FILENAME

Show the change history for a single file.

Additional query parameters:

   a=DATETIME Only show changes after DATETIME
   b=DATETIME Only show changes before DATETIME
   m=HASH     Mark this particular file version
   n=NUM      Show the first NUM changes only
   brbg       Background color by branch name
   ubg        Background color by user name
   ci=UUID    Ancestors of a particular check-in
   orig=UUID  If both ci and orig are supplied, only show those
                changes on a direct path from orig to ci.
   showid     Show RID values for debugging

DATETIME may be "now" or "YYYY-MM-DDTHH:MM:SS.SSS". If in
year-month-day form, it may be truncated, and it may also name a
timezone offset from UTC as "-HH:MM" (westward) or "+HH:MM"
(eastward). Either no timezone suffix or "Z" means UTC.