Can't see the lines between joints in Blender

Sorry if this is a dumb question, I'm an absolute beginner and I've never used Blender or done any modding before. Anyway, I'm trying to make a pose but for some reason I'm not seeing the dotted lines between joints like you see in this image

What I see is this


Is there something that I need to select? I've been clicking around and selecting and deselecting all kinds of things but I can't seem to find anything that will show the lines. Sorry if the solution ends up being something really obvious, I'm still trying to find my way around.