Edit button doesn't appear anymore when studying

Hello,
Essential is in the title. This problems appears yesterday.
Anki version was 2.1.50, then I upgrade to 2.1.51, but same issue.
Anyone has an idea ?
Thanks in advance

Reply to myself !
Sorry, sorry, sorry.
I was using reduced windows, the the button was out of the frame. It’s curious a bit… But it’s works anyway