A newly created file is saved via the main menu item File > Save. This opens a selection menu in which the desired location where to save the file can be specified. In addition, you can specify in which format the new file should be saved. The default format is Textbundle, but alternatively the file can also be saved as a Textpack file. To do this, the format must be set to Textpack using the File-Format-select-button at the bottom of the selection window.