Is it possible to define crawler Config Parameters in Fess properties?

If I want to use same crawler Config Parameter for every crawler, is there a way to define it in the Fess properties? Or elsewhere?

I think some parameters are available in, it’s not all.

If I want to add new field in every crawler, e.g.
is it possibe to define it in

And thanks for quick reply again.

No, xpath is for only a config parameter.