Steps to make printer AirPrint:

1.Open the app that you want to print from.

2.To find the print option, tap the app's share icon.

3.Tap or Print.

4.Tap Select Printer and choose an AirPrint-enabled printer.

5.Choose the number of copies or other options, like which pages you want to print.

6.Tap Print in the upper-right corner.

AirPrint Setup | iPad Printer Settings