A page retrieved from plugin documentation "about" pages show with a green border.
The page flag hover shows which plugin hosts the page.
# State
Green bordered pages show when there is no page with the same title on the origin server.
# Transition
Any fork, whether implicit from editing or explicit from the fork button will copy the remote page "closer" to the reader. Closer could be a White Origin or Yellow Local page.
Warning: the green border is not reliably removed when forked to a White Origin page.
HERE HERE --> White Origin HERE --> Yellow Local
See Graphviz