Hi Sarah,
We are working on the ability to connect an upload file button to the form with no coding.
To create a Submit button:
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Add a button to your page and change its text to Submit .
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Click on the Connect to Data icon
button. -
In the Connect Button panel, select your dataset .
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Under Link connects to , select Submit .
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Under When successful, navigate to , the default is Stay on this page . You can also choose A link… to send users to another page after submission is complete.
For more information check Tutorial: Storing User Input in a Database Collection .