David, It was worth checking that since your is unresolved. You stated you had tried different fonts on different computers but if you want to send your HLV font I'll try again to duplicate the display issue.
David,
Try this...
- Right-click on your DataCAD 19 program icon and select Properties.
- On the Compatibility tab click Change high DPI settings.
- In the High DPI scaling override section check Override high DPI scaling behavior.
- In the Scaling performed by drop-down, select Application.
- Click OK.
This should prevent Windows from 'stretching' DataCAD's interface.
MFM