To find that your poster is the wrong size after you have invested a lot of time designing it can be very frustrating and time-consuming. Here is how to confirm the size of your template BEFORE you start working on your presentation.
PowerPoint has a maximum page size limit of 56x56 inches. The only way to print a poster larger than 56 inches is to create a page half the size of the final poster. For example, if you need to print a 48x72 research poster, the page size should be 24x36 inches. The poster will be printed at 200% resulting in a 48x72 poster.
It is also important to note that anything you add to the poster will be printed at 200%. A 20pt font will result in a 40pt printed font, etc. Zoom into 200% magnification to check the quality of your images. If they look good at 200%, they will print well on the final poster.
To confirm the template's dimensions in Windows:
1 - Click on the DESIGN tab.
2- Click on Slide Size on the upper right side of the window.
3- Click on Custom Slide Size to see the poster dimensions.
To confirm the template's dimensions on the Mac:
1 - Go to the File menu.
2- Click on Page-Setup