When you add placeholders to a layout, if the content in those placeholders changes the layout's purpose, you may also want to rename the layout.
On the View tab, in the Presentation Views group, click Slide Master.
In the pane that contains the slide masters and layouts, right-click the layout that you want to rename.
In the Rename Layout dialog box, in the Layout name box, type the new name of the layout, and then click Rename.
On the Slide Master tab, in the Close group, click Close Master View.
Note: If you apply a slide layout to one or more slides in your presentation, and then go back and edit that layout, for example, by changing its name or adding a placeholder, you must reapply the layout to the slides so that the slides adhere to the updated layout.For more information about editing and reapplying a layout, see Edit and reapply a slide layout.