export pdf from dwg file with correct scale

Hi at all

I'm new in using draft sight and working with CAD programs.

I have a short question:

I got a dwg file from a customer and changed there some things

Now i want to Export this draw as PDF with the scale of 1:50 and i search a lot of time and can't create this

can someone helped me?

If it's Need i can give the .dwg draw as attachment to see what is wrong

thanks a lot for help

Regards

Christian Lückhof