From PowerPoint
Use Save As or Export. Avoid Print To, if you can!
On a MAC, make sure you also check the printing settings as those sometimes interfere with how the file is exported to PDF format.
From Adobe Illustrator
Create a bottom layer with a white rectangle, then export to PDF.
(If the poster was designed in Illustrator without a white rectangle as the bottom layer it will automatically save as a transparent background. This will crop your poster to the closest object getting rid of any margins you may have. Placing a white rectangle as the bottom layer preserves the margins and dimensions of your poster.)
From LaTeX
Export your file using XeLaTeX, not the default PDF LaTeX (Menu --> Settings --> Compiler). If using Overleaf, make sure to clear the cache as well.
Open the PDF and check that all the information has transferred properly before submitting your print order!
Borders around graphics
Sometimes during exporting to PDF, weird borders appear around graphs and charts that are not visible in PowerPoint. While we don't know the precise cause of this, sometimes it can be resolved by saving in a different PDF setting, if PowerPoint gives you the option:
(Please note that you may have to try different options, not necessarily the one pictured)
