Click "Background" to change the background. Click the ears, eyes, head/mouth, legs/torso, or tail to change it/them. Click "Done/PhotoMode" To go into picture mode.
NOTE: If you want to make this your profile icon, then go into picture mode, then right click your wolf pup and click "Save Image As" then make it your Icon. Credit to @FrostyRiver4027 for some of the parts.