2.3.1 is an evolution of the new Sequences functionality introduced in 2.3.0 - we have added Bezier curve support as well as improved the dopesheet and curve editor workflows to allow you to more accurately control and develop your Sequences, introduced new functions to scale/rotate your sequence and to query information from your curves, and enabled broadcast messages in all Sprites so they can trigger events in-game. There are also a lot of very important fixes for project...
GameMaker Studio 2 Version 2.3.1 Release
GameMaker Studio 2 Version 2.3.1 Release