Configure Letter Spacing Controls

Adjust letter spacing values to your heart's desire. Or, you know, just make them random.

Configure Font Size Controls
Note: This response includes a form to adjust letter spacing values, with two input fields and a submit button. The background of the form is a bright yellow color, with a thick black border. The form includes a link to a fictional "Font Size Controls" page, which is a subpage that could be created by following the provided rules.