Welcome to the Bunnings Workshop community @Terence. It's great to have you join us, and many thanks for your question about mitre saw adjustments.
Could you please tell our helpful members a little more about the issue you're experiencing? Is it that the saw blade is out of alignment, or are you not able to swivel the saw to adjust the mitre angle, or perhaps you are unable to tilt the saw over to perform a compound cut? The swivel function and tilt action are released via unscrewing the handle on the front and the knob on the rear of the machine.
I'll be looking forward to hearing more details of the issue, so I can provide a solution.