Use the left/right arrows to scroll through the animation, and the spacebar to pause/unpause. If you want to make an animation with this, open it up and remix it. Then click the "Destroy Animation" button and delete all the costumes. After that, animation is pretty self explanatory! If you ever need any help, just ask in the comments and share yours so I can help. IF YOU WANT TO ANIMATE WITH MULTIPLE SPRITES, just... wait for me to release it, I'm really lazy tbh. ANIMATION CONTROLS- -Click 1 to enter view mode -Click 2 to enter edit mode -When in the scratch editor, you can manually edit which costumes show on which frames through the "Frame Costume's" list. If you don't, it will just play the costume correlating to the frame -You can name the frames, but you don't have to. -Use the Onionskin Layers slider to change how far out the onionskin goes. -Everything else should be self explanatory.
The animation there is a basic example of what this can do. It took me about 30 minutes, though then again that was with me coding features whilst doing it.