Welcome to the Bunnings Workshop community @Lsole. It's amazing to have you join us, and many thanks for your question about aligning a shower door hinge.First, let me provide a warning that shower doors can shatter exceptionally easily, so when you're working around them, you must take extreme care and wear appropriate PPE, including safety glasses, cut-resistant gloves, a long shirt and trousers and enclosed footwear. You should also consider having a professional adjust your shower door due to having to work with a glass panel.
If you can provide a little more information on the adjustment that is needed it will help our members provide informed solutions. Has the door sagged, or is it not closing properly? Do you happen to know the brand of the screen? Are there any small holes that contain a grubscrew?Please let me know if you have any questions.Mitchell