The Spot Healing Brush and Patch Tool were optimized using the Mercury Graphics Engine, making them up to 120 times faster than previous versions.
For the first time, users could add up to 10 instances of the same layer style (such as multiple Drop Shadows or Strokes) to a single layer without duplicating it.
The term refers to a version of the software that has been modified to run without a formal installation, often from a USB drive. Photoshop versions - Adobe Community
Released in mid-2015, version 16.0.1 was a maintenance update following the massive CC 2015 launch. This era of Photoshop moved away from the "static" software model, shifting entirely toward a cloud-connected ecosystem that integrated and Creative Cloud Libraries directly into the interface. Key Features of the CC 2015 Release
2 GB minimum, though 8 GB is highly recommended for stable performance.
The 2015 version introduced several "firsts" that are now standard in modern design:
