If you don't understand what you are doing you shouldn't adjust things!, particularly as they almost certainly won't have gone out of alignment on their own - it's more likely there's a fault instead (assuming it used to work well?).
Many years ago we had a guy bring a black and white dual standard TV in for repair, it was a valve set, and being dual standard had a huge amount of IF transformers on the chassis (pre-PCB). As he brought it in, he commented that he had "tightened all those loose screws down", an examination showed that he had taken every tuning core to the bottom!!.