I was here cracking my head for trying to find out how to use MS Office and still make a good poster. Guess what? IT is the solution! Free templates... See:
1) https://www.posterpresentations.com/html/free_poster_templates.html
2) https://phdposters.com/
3) https://templates.office.com/en-us/Posters
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Please help us keep on inspiring you
2) https://phdposters.com/
3) https://templates.office.com/en-us/Posters
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Please help us keep on inspiring you