Show the names of the instruments

Hello,

I don't understand why the names of the instruments don't appear on my score.
- After some research I unchecked the box In Style -> General -> Do not display the name...
- In my instrumentation, the names appear well
- When I select one or more bars, I right click and then go to the properties of the bar: there I don't have any instrument names. If I enter them under the "Scope" column, they do not register.

What if someone has another idea for me?
Thank you!!!