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JotForm is a free online form builder which helps you create online forms without writing a single line of code. No sign-up required.
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If I understand you correctly, you are referring to the form fields layout right?
Please check this demo form that I've created. I used the "Expand, Shrink, Move to a new line and Move Up/Down" options to achieve this.
You need to right click the field and then select the options you want.
Here are the guide that will help you:
Hope this helps. Thank you.