Add the ability to add UTM fields to the QR Code URL. Have the fields broken out into separate fields and a button to add additional UTM fields to append to the base URL. This would help keep things more manageable.
  1. Base URL to use "https://www.somewebstie.com:"
  2. new
    UTM field added "utm_source", "open"
  3. new
    UTM field added "utm_campaign", "website-special"
Add as many UTM fields as you need to append to the base URL. This is much more manageable then manually writing the URL's each time. This will allow you to see what UTM names and values you are using at a glance.
The resulting URL would read something like this.

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