When you can’t enter the lyrics by the lyric entering pallet, the matter stated below may be the reason.

・The file size of text, application, or other items is set larger than 100%.
When the file size of text, application, or other items is set larger than 100%, reboot the OS after return the file size to 100%, and check again.

・You changed the system font.
When you changed the system font, return it to default font and check again.

・Compatibility between the DAW software and font/text entry.
*IN Piapro Studio plug-in
Depends on the DAW software, sometimes you can’t enter the lyrics in hiragana/katakana because of compatibility between the DAW software and font/text entry. In this case, enter the lyrics in alphabet(か → ka).