If you wish to insert custom HTML in a page, for example an embed from another 3rd party site such as a MailChimp form, a Soundcloud clip or anything like that, you can use the embedded media module in Unicity CMS.
Go to Embedded Media on the Files and Media menu. Click New Embedded Media and select HTML Embed.
Type a title in the top box, and paste your HTML code into the second box. You can preview it if you like using the Preview button:
Click Save to save the embedded item and then insert it into your page using the Insert Module button in a WYSIWYG editor 
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