Change the size of slides

  1. Go to the ribbon to the Design tab.
  2. Click Slide Size button and select Custom Slide Size from the list.
  3. Here you can set size of slides. Pay special attention to Widht and Height.

Note: You can save your settings as a template. To do that on Design tab click arrow down and use Save Current Theme option. Since now you have your own template to use.

How to create a template?

  1. Open a blank presentation.
  2. Go to ribbon to the View tab.
  3. Click Slide Master button.
  4. Choose a slide format from the list on the left.
  5. Use one of predefined theme if you want (Themes button).
  6. In Background section click small arrow in the corner.
  7. New menu pops out. Format a background using it.
  8. Close the Slide Master.
  9. Go to Home tab.
  10. Format Font and Paragraph.
  11. If you’ll need a footer go to Insert tab and click Header & Footer button.
  12. Go to ribbon and click File button.
  13. Select Save As and double click Computer button.
  14. From the list choose PowerPoint Template (*.potx) extenson.
  15. Set your name and save a template on your hard disk.

Tip: There is also a lot of ready templates in the Internet to free download.