To change an existing layout, do one or more of the following: To add a placeholder, on the Slide Master tab, click Insert Placeholder, and then select a placeholder type from the list. Click a location on the layout, and then drag to draw the placeholder. Resize, reposition, or delete a placeholder.
"As there are various applications and software's which are used for assembling the various portions of the slides, and insert different materials i.e images or graphs into the slides."
Explanation:
There are various patterns on which the page layout can be possibly be developed on that bases. As to do that if one is using "Power Point", developed by Microsoft.
As the one who is preparing the slides must use the option given on the menu tab of the window indicated as "Home" option. Now along with that we can click on the right click on the slide of the mouse, which will give us the options including the page layout.
