Is your monitor displaying in its native resolution?
Thank you for your answer Jim.
Yes, I'm using the native resolution. My computer is a MacBook Pro with a Retina display.
Any idea how to fix it ?
I'm afraid I know nothing about the Mac. Sorry.
Thanks again for your answer Jim.
Maybe the issue is not related to Mac.
I tried to hide/show panels, close/reopen Lightroom and finally uninstall/reinstall Lightroom CC but I'm still facing the issue.
Can anyone help me to fix it ?
after opening Lightroom, have you tried checking in "window" from the top menu and check if it's selected "application frame - options - tools " ?
Thanks for your answer.
I did not try your solution... but now it is displaying correctly if I enlarge the right panel.
If I reduce the panel I see the crop again.
Maybe it is related to the french translation for New (Nouveau) and Brush (Pinceau). Thse words are longer in french than in english.
I do not think so because I'm Italian and the words are long as the French, more or less ... works on panel size, but anyway take a look here Viewing Photoshop CS6 in “Low Resolution” on a Retina Display « Julieanne Kost's Blog
Thanks Giordano for these informations.
I will check your link.