Add content to multi-content panes

If a pane is defined as a multi-content pane, dropping a second content item adds the content and the pane is selected. The Pane property updates to show the name of the most recent content added to the pane.

If you attempt to drop a content item that will exceed the maximum limit set for the pane, the add content action will fail. A dialog box appears notifying you that the maximum number of content items has been reached and no more content can be added to the pane.