The two arrow buttons insert and delete one cell at the cursor, shifting the rest of the chart forward or back. On Mac and Windows they are at the top of the Editor panel, to the left of the N and S buttons.

 

Insert space to open room for an intro (select the first cell, then insert sixteen times), to add a bar between two others, or to tidy the barlines after a cut and paste. Delete space to make a bar narrower: a four-cell bar becomes half as wide with two cells removed, which is how a chart fits eight bars on a line. To remove a whole measure, delete each of its cells.

 

Never let a bar split across two lines. Each measure must begin and end on the same system, with a barline on either side. If one runs off the end of a line, add or delete space along that line until it closes.

 

The Editor holds twelve systems and no more. Deleting space in the bars above is what creates room below. The small chord font helps as well.

 

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