The QR Code Tool in Write > Insert Object inserts a graphical QR code containing text or hyperlinks. These can be scanned by QR code readers in smartphones with cameras, which will then display the text, open the link in phone's browser or create an email with the phone's mail client. This can be very useful in printed material, enabling you to provide live links to web pages or for feedback or a way of directly copying text to the growing number of users with smartphones.
For example, the first QR code below links to a web page, the second one sends an email:
1.Click in the topic and select the QR Code Tool in Write > Insert Object.
2.Enter the URL or text you want to encode in the editing box. You must enter the http:// prefix for web links and the mailto: prefix for email addresses, otherwise they won't work in most QR code readers.
See the QR code tool reference for details of the settings and controls.
A number of enterprising online companies operates servers with QR code APIs (application programming interfaces) for a wide range of functions. You can use them to create QR codes that will send an SMS, dial a phone number, save contact details to a vCard, save calendar entries and much more. This works by taking the user to the company's server and then performing a function.
If you search online you will find quite a lot of these service providers. Make sure that they are trustworthy before using them, however: Since you will be routing your users via the provider's servers, you need to be sure what you are getting them into!