The default edit template body cascade consists of:
# If the tiddler has the field ''_canonical_uri'' then use the template $:/core/ui/EditTemplate/body/canonical-uri to display the remote URL
# Otherwise, use the template $:/core/ui/EditTemplate/body/default which provides the default editing interface
You can see the current settings for the view template body cascade in $:/ControlPanel under the ''Info'' -> ''Advanced'' -> ''Cascades'' -> ''Edit Template Body'' tab.