Platform Manager - Overview
With the platform manager you can add or delete specific platforms.
If you want your fonts to work correctly in Windows you should have a Windows Unicode BMP (UCS-2) or a Windows Symbol platform. Because some word processors and DTP applications depend on the Macintosh Roman platform it is also included in almost all fonts.
Note that the ISO platform has been deprecated as of OpenType Specification v1.3.
Press the Add button to add a platform through the Add Platform window. Press the Delete button to remove the selected platform.
The Change button can be used to change between Windows Unicode BMP (UCS-2) and Windows Symbol platforms. But this can result in losing mappings.