Importing and Exporting
You can import three kinds of files by choosing File > Import > Into Tree:
You can import the contents of any text (.txt) file into an article by choosing File > Import > Into Article.
You can export your tree or a subtree by choosing File > Export > Subtree. The subtree is not removed from your current file. Three kinds of files can be created.
You can export the contents of one article by choosing File > Export > Article.