In Spine 4.x, the ease in and ease out buttons were removed from the graph toolbar, and instead, the Curves view was introduced to manage curve presets. The Curves view allows you to define and save your own custom curves, including ease in and ease out types. To use the Curves view, you can create a curve by adjusting the Bezier handles to your desired shape and then save it as a preset. This way, you can apply these custom curves to your animations as needed.
To bring back ease in and ease out functionality, you can manually create these curves in the Curves view and save them as presets. Once saved, you can apply these presets to your animations. Although there isn't a detailed guide specifically for the Curves view in the official documentation, you can experiment with creating and saving curves to get the desired easing effects.
