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Setting the Size and Orientation of your Poster
The most common size of poster is A0 (84.1 cm x 118.9 cm), the maximum poster width and height that PowerPoint
will allow is 140cms or 56 ins.
To change the size and orientation
Click the Design tab on the ribbon
Click Page Setup
A dialog box will appear:
In the ‘Slides sized for:’ drop down menu, select ‘Custom’
Type 84.1 in the width box and 118.9 in the height box for an A0 Portrait poster.
If your poster requirement is for a portrait style poster (tall and thin), then click the portrait orientation button to
swap the values around for a portrait layout.
Click OK to see your new A0 slide. Your workspace should now look similar to the picture below.