zathura/doc/man/_options.txt

-e, --reparent=xid
  Reparents to window specified by xid

-c, --config-dir=path
  Path to the config directory

-d, --data-dir=path
  Path to the data directory

-p, --plugins-dir=path
  Path to the directory containing plugins

-w, --password=password
  The documents password. If multiple documents are opened at once, the
  password will be  used for the first one and zathura will ask for the
  passwords of the remaining files if needed .

-P, --page=number
  Opens the document at the given page number. Pages are numbered starting
  with 1, and negative numbers indicate page numbers starting from the end
  of the document, -1 being the last page.

-l, --debug=level
  Set log debug level (debug, info, warning, error)

-x, --synctex-editor-command=command
  Set the synctex editor command. Overrides the synctex-editor-command setting.

--synctex-forward=input
  Jump to the given position. The switch expects the same format as specified
  for synctex's view -i. If no instance is running for the specified document,
  a new instance will be launched (only if --synctex-pid is not specified).

--synctex-pid=pid
  Instead of looking for an instance having the correct file opened, try only
  the instance with the given PID. Note that if the given PID does not have the
  correct file open or does not exist, no new instance will be spanned.

--fork
  Fork into background

--version
  Display version string and exit

--help
  Display help and exit