You've just downloaded a so-called .zip archive file.
It's a way of conveniently distributing multiple files so you didn't have to download one by one.
It contains several files inside but to view its content you need to extract (unzip) it.
Every modern operating system comes with a program that is capable of unpacking such archive files
so you don't have to download, install and even open any additional software. Click on
the downloaded file to invoke its context menu and look for Extract option.
Click that and all files which reside in the zip file will be unarchived into a single directory to
your device. Navigate to the extracted folder and look for the poster PDF.
Should you need any assistance with opening the file contact me and I
will gladly help you out.
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