QuestionPro QR codes are generated for the live survey link, so there is no direct option to embed custom variables within them. However, you can accomplish this using an external QR code generator. Simply take the survey link, manually append the custom variable, and then generate a QR code using an external tool.
The QR codes are in QuestionPro branding (blue, logo, branding under the QR code). Can I also get the QR Code in neutral black without QuestionPro branding?