It is possible to unpublish a page (take it offline) in Crafter CMS? The word unpublish is never used in the docs, and I looked around and tried some things in the interface, but nothing is obvious. I don't want to delete the page, I just want take it offline so it can be edited and published again at some later time.
The is a very common operation and it seems like really basic CMS functionality. What am I missing?
You should use the disabled flag. Please see the docs: http://docs.craftercms.org/en/3.0/developers/content-modeling.html?highlight=disabled#form-control-variable-names
While modeling your content, add the disabled meta-data field and the content authors can then disable a content item. This also removes the item from search, as you'd expect.
There is an open bug for the API getTree where is doesn't respect the disabled flag, you can track it here: https://github.com/craftercms/craftercms/issues/1326