Zio

Hi recently bought Spriter through Steam, I'm trying to figure out how to rigg I've two issues could you help with : 1. How do I link bones? I some times end up with blue lines connecting the wrong bones if I delete them and do it again it works better but bones are not linked. 2. Can I link bones to sprite parts so that everything stays rigged as it is I keep moving arms and legs out of their desired place by grabbing the limb rather than moving the arrow and trying to drag around the sprite. 3. Not really a problem but is it better to scale down images before or after spriter? I tend to make the parts large would this be an issue importing to a game engine? Should I scale before, in or after spriter? Thanks in advance.