Adobe and Microsoft Break Some Old Files By Removing PostScript Font Support
Recent developments, such as Adobe ending support for Type 1 fonts in 2023 and Microsoft discontinuing Type 1 font support in Office apps, may impact users who manage their own fonts, potentially leading to compatibility and layout issues in older files. Ars Technica's Andrew Cunningham writes: If you want to know about the history of desktop publishing, you need to know about Adobe's PostScript fonts. PostScript fonts used vector graphics so that they could look crisp and clear no matter what size they were, and Apple licensed PostScript fonts for the original LaserWriter printer; together with publishing software like Aldus PageMaker, they made it possible to create a file that would look exactly the same on your computer screen as it did when you printed it. The most important PostScript fonts were so-called "Type 1" fonts, which Adobe initially didn't publish a specification for. From the 1980s up until roughly the early 2000s or so, if you were working in desktop publishing professionally, you were probably using Type 1 fonts. Other companies didn't want Adobe to have a monopoly on vector-based fonts or desktop publishing, of course; Apple created the TrueType format in the early 90s and licensed it to Microsoft, which used it in Windows 3.1 and later versions. Adobe and Microsoft later collaborated on a new font format called OpenType that could replace both TrueType and PostScript Type 1, and by the mid-2000s, it had been released as an open standard and had become the predominant font format used across most operating systems and software. For a while after that, apps that had supported PostScript Type 1 fonts continued to support them, with some exceptions (Microsoft Office for Windows dropped support for Type 1 fonts in 2013). But now we're reaching an inflection point; Adobe ended support for PostScript Type 1 fonts in January 2023, a couple of years after announcing the change. Yesterday, a Microsoft Office for Mac update deprecated Type 1 font support for the continuously updated Microsoft 365 versions of Word, Excel, PowerPoint, OneNote, and Outlook for Mac (plus the standalone versions of those apps in Office 2019 and 2021). The LibreOffice suite, otherwise a good way to open ancient Word documents, stopped supporting Type 1 fonts in the 5.3 release in mid-2022. If you began using Adobe and Microsoft's productivity apps at some point in the last 10 or 15 years and you've stuck mostly with the default fonts -- either the ones included with the software or the ones from Adobe's extensive font library -- it's not too likely that you've been using a Type 1 font unintentionally. For these kinds of users, this change will be effectively invisible. But if you install and manage your own fonts and you've been using the same ones for a while, it's possible that you created a document in 2022 that you simply won't be able to open in 2023. The change will also cause problems if you open and work with decades-old files with any kind of regularity; files that use Type 1 fonts will begin generating lots of "missing font" messages, and the substitution OpenType fonts that apps might try to use instead can introduce layout issues. You'll also either need to convert any specialized PostScript Type 1 font that you may have paid for in the past or pay for an equivalent OpenType alternative.
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