Open the song, tap or click Share, and choose Export Chord Chart.

 

Then either Print to an AirPrint printer (Cmd-P with a keyboard, or Cmd-P / Ctrl-P on Mac and Windows), or save a PDF and print it from a computer. To include the guitar, piano, or ukulele fingerings, turn on that chord font first.

 

For more, see Print a chart or save it as a PDF on the iReal Pro website.