For those who don't know, the Logitech Craft is a wireless keyboard for Mac and Windows that has a special feature called the 'Crown'. This is a button which lets you perform different, customisable actions such as switching between Apps, changing brightness or volume, etc. What makes the 'Crown' more than just a neat little feature, is its ability to change its behaviour in certain apps. For example: in Photoshop it lets you change between contrast, brightness, saturation, and so on..., by tapping it lightly and then fine-tuning those by turning it.
These features only work in specific apps, and have yet only been added by Logitech themselves in form of profiles (Adobe Suit, Chrome, Safari,...). But... they published a software development kit (SDK) so that other companies, or users, can create their own custom profiles. SDK Link: https://github.com/Logitech/logi_craft_sdk/blob/master/documentation/Craft_Crown_SDK.md#9-getting-the-plugin-to-users
What I have experienced so far is, that a lot of people own this keyboard and would love to have more support for the crown, and Affinity could be one of the firsts to make their apps available for it.