Fonts are not Type 1 PostScript (exceptions)
This check flags up when Adobe PostScript Type 1 fonts are used in the InDesign document.
PostScript Type 1 fonts, as their name suggests, were intended for print production using Adobe PostScript. They are an old font format which have largely been superseded by the later OpenType format as PostScript Type 1 fonts not supported in digital and web publishing.
Adobe have announced they are to stop supporting PostScript Type 1 fonts in any new software released after 2021.
Different versions of InDesign will show PostScript Type 1 fonts slightly differently using either a red or grey ‘a’ symbol is used.
PostScript Type 1 fonts show their Type as ‘Type 1’ on the Type > Find/replace fonts menu
Fix this problem by finding and activating a different font format in InDesign or in some cases by substituting for other fonts.
There may be some cases, e.g. for minor amendments to backlist projects, where the user wishes to make an exception and continue to use GreenLight.
Use the GreenLight Print Production Tools panel > Reset Type 1 Font exceptions to remove the expectations added to the document.
Adobe InDesign Font help
Apple FontBook help
