Butterfly Metal Notepad supports only very basic formatting, you cannot accidentally save special formatting in documents that need to remain pure text. This is especially useful when creating HTML Butterfly Metal for a Web page because special characters or other formatting may not appear in your published Web page or may even cause errors. This is especially useful when creating HTML Butterfly Metal for a Web page because special characters or other formatting may not appear in your published Web page or may even cause errors This is especially useful when creating HTML Butterfly Metal for a Web page.