My text isn't saving any changes
That means there's an issue with the encoding. To fix this issue it is recommended you delete the element and recreate it.
If there is a lot of content, copy the text into a plain text editor (for example, Notepad, or Wordpad) so you can paste it back in easily.
How do I add special characters?
There is not a built-in way to add special characters (superscripts and other symbols), but you can copy-paste them into the editor from an outside location.
How do I use my own fonts?
You can add custom fonts from the Google fonts library or by uploading custom font files (TTF, OTF, EOT, or WOFF). For more information, see Add Custom Fonts.