Open the song you'd like to print.
Touch the Share icon, choose Export Chord Chart
Choose Image or PDF format then:
• Print directly from your device if you have a wireless printer  (you might need a third party app such as PrintShare) or
• Email it to yourself and print it from your computer

If you want the chord diagrams in the chart, turn on the Chord font you want, here is how.

In case you have a chart that has only 4-5 systems, the printer might default to landscape.
Open the Editor and add an extra character 2-3 lines under the last bar to make sure the chart will be printed in portrait.