how do i change the vocal sound in UTAUSynth?

[esperAnte]

i'm relatively new to producing with UTAUSynth and have noticed one thing with the application: i can't make defoko say anything other than あ. i right clicked on the note and tried to paste a new vocal in and it didn't let me. i have downloaded the application from the official site and have had no other issues.

 

[Kiyoteru]

Double click on the note to type lyrics. You need to write a single hiragana character. If you haven't set it up yet, this is how you can type in Japanese.

Japanese Input Method User Guide for Mac

On your Mac, use the Japanese or Ainu input method to enter characters in input sources such as hiragana, katakana, or romaji.

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