GameMaker - How To Edit Sprite frames
Sometimes you will need animation for some of your game characters, objects,...
Or maybe different styles of same character (like change in color, look,...) changed in time or under some condition.
For those purposes you will need to add additional images to your already made Sprite.
Those additional images of Sprite are called frames, and they are mostly used for animation.
You add more frames to your Sprite by:
entering Sprite - Edit Image mode
clicking on plus sign in top left corner
or right click - copy/paste existing Sprites and then change their look with Edit tools
By doing so, you automatically create animation in GameMaker engine, but don't worry, we will learn later how to control that animation with code.