By default you can type only in elements which accept text content. So if the element is declared as empty or element only in the associated schema you are not allowed to insert text in it. This is also available if you try to insert CDATA inside an element. Instead a warning message is shown:
Figure: Editing in empty element warning
You can disable this behavior by checking the Allow Text in empty or element only content check box in the Author preferences page.
Entire sections or chunks of data can be moved or copied by using the drag and drop support. The following situations can be encountered:
- when both the drag and drop sources are Author pages, an well-formed XML fragment is transferred. The section is balanced before dropping it by adding matching tags when needed.
- when the drag source is the Author page but the drop target is a text-based editor only the text inside the selection is transferred as it is.
- the text dropped from another text editor or another application into the Author page is inserted without changes.
Removing the Text Content of the Current Element
You can remove the text content of the current element and keep only the markup by
highlighting the appropriate block of content and use the 
Remove Text action
that is available in the Refactoring submenu of the contextual
menu and in the menu. This is useful when the markup of an element must be preserved,
for example a table structure but the text content must be replaced.