Thanks for sharing this option, Christy!
FYI for others, I had a look and you need to: click on “Siginidenw” (‘Letters’) button first before clicking on “Kanhakɛ jiginnenw ni yɛlɛnnenw” (‘Low and High Tones’)
PS - While in English, laypeople call them “accent marks” because that is the name in French, etc., that can be a little misleading in the case of Bambara since they actually don’t mark anything like “accent”. Instead, I like to call them “(tonal) diacritics” or “tone markers”, etc. “Diacritics” is the neutral technical term that specialists of orthography use for so-called “accent markers”.