+# Primary prompt on the right-hand side.
+axzsh_is_widechar_terminal \
+ && RPS1="%(?..%{$fg_no_bold[red]%}%? ↵%{$reset_color%})" \
+ || RPS1="%(?..%{$fg_no_bold[red]%}<%?>%{$reset_color%})"
+
+# Default execution trace prompt.
+PS4="$fg_no_bold[yellow]->$reset_color "
+# This prompt is compatible with sh(1) and bash(1), too, so export it!
+export PS4