To change the font size/DPI on a workstation the following registry entry needs to be added.
Key: HKEY_CURRENT_USER\Control Panel\Desktop
Type: REG_DWORD
Name: LogPixels
Data: 100 (100 is an example; the decimal value of 100%)

NOTE: Technical Support does not provide support for problems that arise from improper modification of the registry. The Windows registry contains information critical to your computer and applications. Make sure you back up the registry before modifying it. For more information on the Windows Registry Editor and how to back up and restore it, refer to Microsoft Article ID 256986 “Description of the Microsoft Windows registry” at Microsoft Support.