Change the Page Set Up
Slide size
and orientation can be found on the Design Ribbon, next to the
Themes.
2.
Try it: Change the Page Setup
Go to
Design ->Page Setup.
Click on
Page Setup
Try
This, as well: Edit the Page Setup
Slides
sized for: Custom
Width: 8
inches
Height: 10
inches
Slide
Orientation: Portrait
Click
OK. Keep going, please...