iReal Pro layout conventions

[pdxdjazz]

About vertical separation, I've found that when there are some comments above the first system, it overlaps with the style/composer info line. So an extra vertical space is often needed for the first system.

Maybe I don't understand what you are seeking...
The "move system down" arrow(s) (1,2 or3 steps) work as expected on the first system as well as lower systems on both my iPad and android apps. Comments I write using first system text when raised above that system don't overlap the composer line.
Text Above First System Example - Unknown Composer

Text Above First System Example 1 - Unknown Composer

Please post an example chart showing the issue.
)BOB

EDIT:
Sometimes (on the longest charts) the systems can become squeezed together

[CyrilleB]

In your first example, the input text clearly overlaps with "medium swing" text. This is why the second example looks better (with the additional vertical space)

[pdxdjazz]

The appearance of the display may vary on different devices.
Use the down-arrow(s) to improve your chart's layout appearance as necessary.
We remain constrained by the current single-page limitation.
)BOB