I’ve read some of the posts about PDF file size but this is a different issue. I work with Sketchup and Layout from 2 different networked computers. When I create a PDF from Layout, the file size is almost double from one computer than the other. I checked the software versions are different, 23.0.419 and 23.1.340. Both are 64-bit. The older version creates the smaller (emailable) PDF file. I reluctant to try updating or reverting to different versions. Any thoughts?
One thing that comes to mind is the “Use JPEG Compression” setting in the export options and the accompanying slider. I always turn it off because it causes ugly artifacts to raster-rendered SKetchUp content. Turning it off gives better quality output (using PNG compression only) but the file sizes are considerably bigger.