To Show / Hide Payment QR Code, please follow the below mentioned steps:
Step 1 : Go to Settings.
Step 2 : Under General settings, Select Preferences.
Step 3 : Enable the toggle “Show Payment QR” to show the QR Code in the document.
Disable the toggle “Show Payment QR” to hide the QR Code in the document.
Step 3 : And then, click on Save & Update.