A wiki page is rendered with a translucent background when that page exists only in the browser as a ghost of a page that has been or will soon be.
A link to a non-existent page opens a ghost that offers to create the missing page.
A search creates a ghost with References to pages found in the neighborhood. These can be dragged elsewhere.
A click on a Journal Action will show a previous revision as a ghost page which can be forked over more recent changes or items dragged as wanted.
A drop on a Transporter will create a ghost page from which items can be taken. If the ghost has a desireable name then it can be forked in full as that name.