Publish Online - PNG won't go to full screen

Hi all,

I recently created some information flyers in InDesign, which I have published online. I use a Wix-based website and have added a 'custom embed' window where I have added the URL created by Adobe. I was hoping that visitors could click on the embedded window (which shows a thumbnail of the flyer) and it would open in full screen. Instead, it only opens to the size of the embedded window. I don't want to create a massive embedded window as this would look bad on the website.

The only option now to get a full-size copy is to utilise the download PDF option, which downloads the file and opens in a new browser window. This option is not always easy to find and I want visitors to be able to click on the thumbnail and have a larger version to read. I am guessing I either have the publishing settings wrong or it is an issue with how I have embedded it into my website.

Any help with either would be greatly appreciated.

Thanks in advance!