Users could highlight text to see an in-context menu of OpenType alternates.
By build 12.1.0.56, InDesign offered full HiDPI display support on Windows (previously, it was macOS-first). Icons were vector-based, and the UI scaled properly on 4K and 5K monitors. This was a godsend for professionals migrating from 1080p to high-resolution displays. Adobe InDesign CC 2017 12.1.0.56
Adobe used this version to push its "Creative Cloud" ecosystem as a cohesive unit. Users could highlight text to see an in-context
: New controls were added to scale arrowheads independently of the stroke weight. Hyperlink Performance it was macOS-first). Icons were vector-based