Thanks, Charles, for your input. I will try your method.
Yes, line numbers are not possible in a table, I tried it, but without success and then reading Google understand, it's not possible.
It's intersting what software they use to produce these kinds of documents. Maybe Publisher?
There are a big number of charter parties used in commercial shipping, they also have a first page as box form where to fill in the information. During negotiations these lines are being stricken out, additional line put in etc. In former days it was don by hand on a print-out form, and honestly I think its an archaic way these day, it's used less and less. But sometimes these forms are needed.
In general, curently these forms are done in Word, each doing it differently, very ugly and awkward, tabbing by hand, numbers by hand, etc., a complete mess.
Will report if I find some solution.
I might investigate html/css possibility.