Buttons on QR Scanner

I want to make an app which can read QR Code and i successfully integrated using documentation. But now according to my requirement i want 2 buttons on camera screen(QR Code Reader). Any type of help will appreciated. Thanks

What QR Scanner plugin / library are you using?

the one available on documentation
github.com/phonegap/phonegap-plugin-barcodescanner Documentation -> ionicframework.com/docs/native/barcode-scanner