Fonts in compose window not applied

Despite I have applied the fonts Calibri and 18 size, as you can see when writing a new message,
I can hardly read what I’m writing in lower or upper case.
Till version 10.1.4393 everything was working fine.


It appears you have zoomed out of the message.

To reset it, right-click in the message body and choose Zoom > Original.

Thanks @Gary , Problem solved.