The 10.4.0 update focused on stability and expanding hardware support, though it included several quality-of-life improvements for Power users:
Following reports of sluggishness in version 10.3 (particularly with the healing brush and zooming), 10.4 targeted these bottleneck areas for a smoother editing experience. Significant Tools from the 2021 (v10.x) Era
Released in August 2021, was a pivotal maintenance update in the "version 10" cycle. While it didn't introduce the massive architectural shifts seen in the jump to v11, it refined the performance and camera compatibility for professional photographers working in the Creative Cloud ecosystem. Key Features and Enhancements in v10.4.0 Adobe Photoshop Lightroom Classic 2021 v10.4.0
This update added raw file support for several new pieces of hardware, including the Apple iPad Pro (11-inch, 3rd Gen) and various new lenses.
This replaced the old Split Toning tool with a more powerful three-way color wheel system, allowing independent control over highlights, midtones, and shadows. The 10
Improved use of the graphics processor significantly speeded up brushing, gradients, and overall image rendering in the Develop module.
The introduction of "Box Zoom" and "Scrubby Zoom" (holding Shift and dragging) made it easier to navigate high-resolution images quickly. System Requirements for 2021 v10.4.0 Key Features and Enhancements in v10
A long-requested workflow efficiency, this version finally allowed users to duplicate an entire Collection Set, including all the collections within it, in a single click.
