translate English to French: For this purpose select the command Sharpen - Unsharp Mask from the menu Filter and set the following values for the parameters: Amount 150%, Radius 3.5 pixels, Threshold 4 pixels.
À cette fin, choisissez la commande Sharpen - Unsharp Mask du menu et fixez les valeurs des paramètres suivants: Amount 150%, Radius 3.5 pixels, Threshold 4 pixels.