I just updated to the latest Rhino6beta (12.12.2017) and needed to print a layout created with the previous version.
Seems that now the dimensions are not aligned anymore with the geometry.
Can you send me a file that shows this behavior? I’ve been spending a lot of time improving PDF export in this area over the last few days and it looks like I missed something.
@stevebaer Do you have an email address? I can’t post files here and the problem still are not fixed. Even In the RC1 I have strange results in Layout.
In one place I get 22mm measure instead of 341mm.
Just from your words and the picture, I can’t tell if this is happening in the layout or only in the resulting PDF output…
It’s in Layout.
OK - so it doesn’t have anything to do with this thread…
Can you post a file? Again, just by the text and image, it looks like you are snapping to things ON the layout instead of IN it.
Yes I do 
You can send a file to steve@mcneel.com