I have an arm which I would like to animate with the bone tool, however when I try to use the bone tool it treats the hand and the arm as two seperate things and will not allow a bone to go from one to the other:

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(Image of problem)

While It may look like I have accomplished what I am wanting in that picture it hasn't as when I try to move the bone it moves the hand alone, when i try to make another bone from that one it creates a seperate armature, both the arm and hand are part of the same layer and are not symbols.