If it is longer than 3 pages, then you have to include the most important content within 3 pages only, support it by links, screenshots and do mention in a description that this was cropped to meet the limits for the assessing purpose.
Being nominated, is recognition to me , which falls under mandatory as you suggested:
Hi Connect,
I understand that this forum is specifically for the UK Global Talent Visa, and I am not referring to the Australian Global Talent Visa. My question is about how to use a nomination document (such as Form 1000) as evidence for the UK Global Talent Visa and how to properly crop it.
I think you can use a letter from the AcS as industry recognition for the mandatory criterion and appemd the signature pages to show over 509 members endorsed you. This used to be a type of evidence used in mandatory criteria. I know people who used this previously