Please spread it under the line which wants to liven up somehow (monologue) and use it.
When the line becomes long, I think that it becomes a good feeling when the black part in the center is stretched sideways with the transformation tool as it is in the shutter of the end.
なんとなく盛り上げたい台詞(モノローグ)の下に敷いて使って下さい。
台詞が長文になる場合は端のシャッてなってるところはそのまま、中央の黒い部分を変形ツールで横に伸ばすといい感じになるかと思います。

