First you choose your template which won't be so hard if you know what your poster is going to be about.
Second of all, you might have to choose your layout (which depends on your opinion)
Third, you will have to choose a topic for your poster.
Fourthly, you start writing about what you wanted to write about and you could add pictures to your poster, but it depends on what background you picked.
Finally, after you you've finished your presentation you can save it and print it.
Thank you for reading my blog post hope it was helpful! (;
Ps:if it doesn't work we are really sorry it's non of our fault!