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 uses that size.

 

On iPhone, iPad, and Android, one button in the Editor toolbar cycles through the sizes. On Mac, click the N or S button in the Editor panel, next to the space buttons, or press Cmd-Option-N or Cmd-Option-S. On Windows, click the N or S button in the Symbols grid of the Editor panel.

 

The small size frees up room in a crowded bar.

 

For more, see Spacing chords and bars on the iReal Pro website.