Final answer:
The main idea of the article is that Pixar's short film 'Out' makes history by featuring a gay protagonist, marking a significant step forward in LGBTQ+ representation in animated movies.
Step-by-step explanation:
The main idea of the article 'With gay protagonist, Pixar short Out makes history' is that the Pixar short film 'Out' features a gay main character, which is a historic moment for the company. This represents a significant step forward in LGBTQ+ representation in animated movies, as it is the first time that Pixar has featured a gay character as the protagonist.
The article highlights the importance of diverse representation in media and the positive impact it can have on marginalized communities.