How can I change vertical spacing between specific questions rather than universally?

Why is this css not moving the two check boxes rows vertically closer to each other?

#input_28, #input_29 {

    margin: -36px 0px -33px 0px !important;

}

This moves the boxes but not the associated text:

#input_28_0, #input_29_0 {

    margin: -36px 0px -33px 0px !important;

}

Am I using wrong field ids? How do I find the correct ones? When I look at the properties for those questions and click on field details, the field IDs are #input_28_0 and #input_29_0. Maybe those are the IDs for the boxes, not the whole row?

Hello,

Please inject the following custom css code in your form and remove the previous one you have added for checkbox question:

li#id_28, li#id_29 {

    margin-top: -40px;

}

The following guide should help you how to inject custom css code in form:  https://www.jotform.com/help/117-How-to-Inject-Custom-CSS-Codes 

Hope this helps.

Do get back to us if you have any questions.

Thank you!

Thank you. How do I find the correct IDs for any other items I may want to space closely? (When I look at the properties for those questions and click on field details, the field IDs are #input_28_0 and #input_29_0. )

There are 2 ways to do this:

1. The easy way - Use our Form Designer. Double clicking (it's important you double click it) on any form field on the Form Designer will point you to the exact ID that needs to be adjusted.

Related guide: Form-Designer-Tutorial-Let-s-create-fantastic-forms

2. Or the traditional way - Use the browser console in Chrome to inspect the target element.

Checking the ID from the Form Builder properties window will only work if you're targeting an actual field alone. In your case though, it's different, what you're trying to adjust is a form line (combination of label and control field) thus explaining why the IDs are different.