The core features introduced in the 2015.5 release (which version 17.0.1 inherits) include:
For users looking to install this specific version, note that Adobe typically recommends using the to manage updates. Adobe Photoshop CC 2015.5 v17.0.1 Update 1 ISO ...
: Direct installers for legacy versions like CC 2015.5.1 were historically provided by Adobe for troubleshooting. The core features introduced in the 2015
: When rotating or expanding a canvas, Photoshop can now automatically fill in the gaps with matching content from the image, preserving the original background. Adobe Photoshop CC 2015.5 v17.0.1 Update 1 ISO ...
: Corrected an issue on macOS where print colors were off when using "App Managed Color". Installation & Availability