The minimum and maximum frame adjustments are included in the Installation and User Guide for each pivot shower door and screen.
If you need any further help, just call our Customer Services team on 0800 001 4040 or contact us here.
All our pivot shower doors come with dedicated installation instructions - if you've lost yours check our product resources library for a digital copy. If you feel like you need professional help, browse our find a pro page to find an installer near you.