RetroHexChat highlights messages that mention your nickname or custom words. Highlighted messages have a colored background and the channel flashes in the conversations sidebar and tab bar.
Default Behavior
Your own nickname is always highlighted (case-insensitive, whole-word match).
Custom Words
Open the Highlight Words dialog (Ctrl+Shift+H or Tools > Highlight Words) to add custom trigger words with optional background colors.
Sound Notifications
A notification sound plays when a highlight match occurs.