Okay, I'm replying to myself here as I solved my issue!
Went to Windows 10 Display Settings and changed Custom Scaling from 150% to 125% and Tableau 10.4's display/resolution has been restored to normal.
Please see ScreenShots attached.
(Perhaps there's something the dev's can fix internally? 10.3 has no Custom Scaling issues, so maybe 10.4 can be updated likewise?)
Hi, When you published to the server, were you seeing WYSIWYG?.
I am facing resolution and scaling issues when published, Workbook looks fine in my lenovo high res 14 inch ultrabook, (Scaling set at 150%) and Workbook (1166 X 768 resolution), but when published it looks tiny and spaced out.