Thanks to the comment https://stackoverflow.com/users/774691/john-k-doe, I finally understood why my emacs -nw appeared like this.
I edited the font size (for the default face) in the emacs window (started without the -nw option), and then saved this new parameter using the menu item Options -> Save Options . This action changed my ~/.xemacs/custom.el , loaded by default into my ~/.emacs file. The modification included background and front properties for the face by default with the value used in the "Window" mode.
To solve this problem, I simply deleted this user entry from the custom.el file.
Manuel selva
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