I am using a theme and I need to know how to increase the vertical spacing between label and field?

I am using a theme and I need to know how to increase the vertical space between a label and the input lines. I am new to all this! Would I enter the CSS code in the Form Designer....and what would that code look like? Also, I have 4 input tables with only one column for input. How can I make that column wider for the person inputing information. The input box allows for quite a bit of information, but I would like to see a larger box. I'm sorry I do not have screen shots. I'm new to my laptop and haven't quite figured out screen capture. Again, what would that code look like?

If you're working in this form: http://www.jotform.us/form/80653934884166

Then it should be possible, here is how you can increase the space between the label and field, just insert the below CSS to Custom CSS Field:

.form-label {

    margin-bottom: 15px;

}

Regarding the Input table, which field would you like to make wider? So we can provide the proper CSS.

We'll wait for your response.

Thank you!