How to enter diacritics

Position the cursor where you would like to insert a diacritic.
Go to: http://www.fileformat.info/info/unicode/char/search.htm
- Find the appropriate page for the character you want, e.g., search “inverted question mark”
- Go to 'Encodings' section and 'How to type in Microsoft Windows'
- Take note of the number from the option that shows Alt followed by 0, e.g., '0191'
Return to RIMMF at the position where you would like to insert the diacritic
Hold down the <Alt> key while you type the diacritic number using the number pad