I discovered an oddity when changing the staff size. If I use layout-set-staff-size certain chords produce an ugly alignment, whereas a set-global-staff-size doesn't. In the following snippet, uncomment line 5 and comment line 20 and the 3rd chord changes its layout. Oddly, the surrounding chords are OK. Something to do with ledger-lines, maybe?
Also, I thought that the local staff size should take precedence over the global, but if both lines are left in the chord is OK.
\version "2.19.52"
\language "english"
%#(set-global-staff-size 14)
\score {
\new Staff
{
\clef treble
\relative
{
<e a c> <f b d> <g c e> <a d f> <b e g>
}
}
\layout {
%comment out this line
#(layout-set-staff-size 14)
}
}