Slide Size

Changing the Slides sized for drop-down ??

Use the page setup to set the size orientation and type of slides. By default the slides are sized for onscreen show and are set to print Landscape

Slides-Sized for drop-down list

SS
To create a sign or banner, choose File > Page SetUp click on Slides sized for list box.

On Screen Show

10 by 7.5 inches
254 by 19.05 cm

A4 Paper

27.51 by 19.05 cm

A3 Paper

35.56 by 26.67 cm

35mm

28.57 by 19.05 cm