Copyright Font

I used Musescore 1.3 for a long time to write drum score, so I'm very happy to see the 2.0.2 update.
But the copyright font confused me a lot......
In 2.0.2, when I want to create a new score, I can type any information for this sheet including copyright.
And I also can edit these words like the attachment.
But the copyright can not. Either the words can not add or delete.
However, it works in 1.3. And I can also add additional copyright information on existing words.
Please tell me how to solve it, thanks a lot.