The following characters are allowed:
upper-case and lower-case alphabetical letters and numbers
& (ampersand)
# (number sign)
( ) (parentheses)
. (period)
_ (underscore)
- (hyphen/en dash (shorter))
The program will not allow you to save text input that contains unrecognizable characters which come from formatting in other documents, such as Microsoft Word. See Notes on Copy/Paste from Other Documents.