[Feature Request] Page Excerpts

Ability to insert content from an existing page. Either whole page or excerpt. This would allow repeated content to be updated from a single source rather than tracking down the out of date content and updating separately.

Other platforms accomplish this with 3 macros. For whole page, one macro calling the page name or a page's unique id. For excerpts, the first macro defining the source in the source page then a second macro calling it in the destination page. Excerpts could potentially be used to provide a sort of summary on table of content pages.