(url), 'width', 'height', 'alt', 'align'.
- url: Url for the given title.
+'ApiOptions': Called by action=options before applying changes to user
+preferences.
+$apiModule: Calling ApiOptions object
+$user: User object whose preferences are being changed
+$changes: Associative array of preference name => value
+$resetKinds: Array of strings specifying which options kinds to reset.
+ See User::resetOptions() and User::getOptionKinds() for possible
+ values.
+
'ApiParseMakeOutputPage': Called when preparing the OutputPage object for
ApiParse. This is mainly intended for calling OutputPage::addContentOverride()
or OutputPage::addContentOverrideCallback().
&$buttons: Array of edit buttons "Save", "Preview", "Live", and "Diff"
&$tabindex: HTML tabindex of the last edit check/button
-'EditPageBeforeEditToolbar': Allows modifying the edit toolbar above the
-textarea in the edit form.
-Hook subscribers can return false to avoid the default toolbar code being
-loaded.
-&$toolbar: The toolbar HTML
+'EditPageBeforeEditToolbar': Allow adding an edit toolbar above the textarea in
+the edit form.
+&$toolbar: The toolbar HTML, initially an empty `<div id="toolbar"></div>`
+Hook subscribers can return false to have no toolbar HTML be loaded.
'EditPageCopyrightWarning': Allow for site and per-namespace customization of
contribution/copyright notice.