Setting up your Canon Pixma iX6820 printer for wireless use can seem daunting, but it's actually quite simple. Here are the steps you need to follow:

1. First, ensure that your printer is turned on and that it is connected to a power source.
2. Press and hold the Wi-Fi button on the printer until the light starts to flash. This will put the printer in the wireless setup mode.
3. Next, go to the settings on your computer or mobile device and select Wi-Fi. Look for the Canon Pixma iX6820 printer on the list of available networks.
4. Once you have selected the printer, enter the password when prompted. The password should be printed on a label attached to the printer.
5. Once you have entered the password, your computer or mobile device will connect to the printer wirelessly.
6. Finally, install the drivers and software for the printer on your computer or mobile device. You can download these from the Canon website or use the CD that came with the printer.

With these simple steps, you can set up your Canon Pixma iX6820 wireless printer and start printing wirelessly from your computer or mobile device.