Thank for this tip PeterT... so I've tried to change this setting and it's really better !
But I noticed that the biggest ghosts are always here when we have a frame (for example : the frame opened when I use the dictionnary)

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Do you note the same thing?
PS for devellopers : can you add this little instruction on the first page of this post (where we can download this FW 3.15.0) in order to help the owners of Glo model (https://www.mobileread.com/forums/sho...d.php?t=185660) ?
And after, if I'm not the only one that meet this problem : you have some work !