Idea leverage is when a writer takes an idea that already exists and uses it as support for an argument they're writing. In other words, they search for an idea and then add it to their outline.
Idea leverage is one of the most powerful features because the writer only needs to edit the point of the idea they are leveraging. The rest of that idea (and its support) then seamlessly become part of the writer's work.
TK: an illustration of a branch being leveraged and used by a writer in an argument they're working on.