That's it ! I have succeeded !  
 
Of course, I took more time than expected, because it was relatively arduous, but I finally managed to penetrate into the bowels of the new forum, and here my first news posted on "MyDiscussions".  
 
 
 Well, unfortunately, some of you aren't lucky enough to have Photoshop, but fortunately there are free software or not too expensive that can remedy it such as Gimp !

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thanks for the post.