QR barcode Ffixed size

Dear Frds,

I'm trying to display QR code in smartforms via system barcode .But as my character in variable increase the size of the QR code also increases also i couldn't able to read more than 255 characters. I have also minimized the Main window also included template in it. even though the size increase out of the main window . kindly suggest me to proceed further.

Regards,

Mohanapriya.K