If you're looking for directions on how to format and print a poster-sized presentation, you want to go to:
MyBucknell
Campus Information and Resources
PPM (Publications, Print, and Mail)
Scroll down to Graphic Services
Or you can go directly to the page on printing research posters:
https://myweb.bucknell.edu/research-poster-submission-form-and-pricing
This also contains a link to Poster Design Tips, which also includes templates that you can use for Powerpoint.
If you have any questions, please contact PPM directly.