Can you change the appearance of button to save information entered into the form?

The button does not stand out enough and people are missing the step of saving the information when they complete the form.  Is there a way to make the text, button or something a different color or more bold? Is there a way to require that if information is entered into the medication and frequency fields that they must hit 'save' before going to the next page?

You can change the text color injecting this CSS code: 

button.save {

    color: #0b1b70;

}

Guide: https://www.jotform.com/help/428-How-to-Inject-CSS-Codes-to-Widgets 

To require the field, simply go to the field settings and set the required property to yes: 

I hope this helps.