Choose Slide - Slide Properties.

Choose Slide - Slide Properties and then click the Page tab.

Choose Slide - Slide Properties and then click the Background tab.

Choose Slide - Layout.

Choose Slide - Change Slide Master.

Choose Slide - Change Slide Master - Load.

Choose Slide - New Slide.

Dans la barre Présentation, cliquez sur

Icône Nouvelle diapo

Nouvelle diapo