If the less-than symbol ("<") is typed and no other key is pressed within a specified delay (half a second by default), a tag list popup will be shown. Note that only tags which are the parent element is allowed to contain are listed. The arrow keys can be used to select a tag; if you start typing a tag name, only tags whose names begin with the already-entered text will be shown.
Pressing Space or > will insert the currently selected tag into the buffer. Pressing Enter will insert the tag and show the Edit Tag dialog box; see Chapter 5, The edit tag dialog box.
Entity completion works in a similar manner; typing & will show an entity list popup. Pressing Space, Enter or ; will insert the currently selected entity into the buffer.
Typing "</" will automatically close the last open tag.
Another convenience feature that is disabled by default inserts a closing tag when you finish typing an opening tag.
These features can be enabled, disabled and configured in the SideKick and XML>XML pane of the Plugins>Plugin Options dialog box.