Depending on the error correction rate of a QR Code, up to 30% of it may be destroyed or altered without affecting the readability. This technical feature allows to insert a logo that covers parts of the Code structure.
The higher the error correction rate is, the more characters must be encoded to keep it readable. This may increase the required space and print size of the QR Code.
The error correction rate is set to 30% for QR Codes with logo and to 7% for Codes without logo.
To manually select the error correction rate for a QR Code, follow these steps:
1. In the Manage view, click the Download button next to a QR Code.
2. Click on More Options in the window that pops up.
3. Set your error correction rate and choose a file format for downloading.