What is JotForm?
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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JotForm Support Manager
You mean to reduce the height just like on this form?
You can do that by inserting this Custom CSS code (which is the one used in my example)
padding: 3% 0!important;
However, the easiest way is by using our new Form Designer ToolUsing the form designer is simple:
-. While having your form opened on Edit mode, click the Form Designer Icon on the Form Style toolbar. (Pictured below).Then Select the Collapse you want to reduce and you'll get the styles attributes in the right side bar. You can play with the Vertical padding and other properties, such as Horizontal Padding, Vertical Margin, etc.
Please give that a try and do let us know should you have more questions.