"Organizing sprites into atlases is important as it decreases loading time and increases performance of your game. You can create atlas by hand, but it would need lot of effort and it would be time consuming. Usually, you will use some specialised tool. In these days most used tool is Texture Packer. Unfortunately, this tool is just for creating atlases from individual frames and nothing more. It does not allow you to add additional properties to frames of your atlas.
In this article I will show how to add additional properties to frames in Phaser engine, how to create atlas with these properties using SBC PicOpt tool and finally how to build flexible character with them."