Chords print at one of two sizes, Normal and Small. Put the cursor where the change should start, then choose the size. Everything from there until the next size marker follows it.

 

On iPhone, iPad, and Android, one button toggles between N and S. On Mac and Windows, click the N or S button beside the chord input field.

 

The small size buys back a useful amount of room in a crowded bar.

 

For more, see Chart layout and spacing on the iReal Pro website.