English:
Based on your post, I understand that you want to show all contents in the multiple lines of text column of list form.
Per my knowledge, it is impossible to achieve this without creating a custom form via power apps.
Français:
D'après votre message, je comprends que vous souhaitiez afficher tout le contenu dans la colonne de texte à plusieurs lignes du formulaire de liste.
À ma connaissance, il est impossible d'y parvenir sans créer un formulaire personnalisé via Power Apps.
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