If you receive HTML that belongs in the <body> of your site you can embed it through the use of the Embed Code Widget in the Design App.
To embed code in this way, simply hover over the Element Icon in the Bottom Toolbar of the Design App and select the Embed Code option.
Once you have done this, a black box will appear on your canvas. Click on this box and select the Embed Info tab in the right side Properties Panel. From there you will see a box labeled Custom Code. Click on this box and a pop up will appear. Paste your code there and hit Save.
Note: Showit renders the code exactly as it is provided, we do not offer controls to customize the embed code. Not all embed code will scale in size.
You can then resize and place the Embed Code box wherever you like within your canvas. For more information on Embedding Widgets, check out this article.