Change Slide Master
تام تەسۋىر لايىھە
Displays the slide designs you can apply to your slide. Select a design and click OK to apply it to the current slide.
Exchange background page
Applies the background of the selected slide design to all of the slides in your document.
Delete unused backgrounds
Deletes unreferenced background slides and presentation layouts from your document.
Displays the Load Master Slide dialog, where you can select additional slide designs.