line weights after sending to print

[timberhill]

Hello,

I am trying to figure out why the line weight change after sending a layout to PDF / print? I know this topic has been discussed before, but I am yet to resolve the issue for myself. I've been using Chief Architect for over a decade and updated to X16 two weeks ago, I haven't had this issue prior to then. I have read through past posts regarding this issue and have tried correcting it without success. It's very frustrating after putting time into making a layout and then it all changes when you go to print. This software cost too much to have such glitches. I attached images of a plan I am working on both before and after I send it to print, it might not look like much, but it looks absolutely terrible on paper.