staffsep unit

Default Command lineScope Available in
46pt-dunitgenerationabcm2ps
abc2svg

Do not put a staff system closer than unit from the previous system.

maxstaffsep unit

Default Command lineScope Available in
2000ptnonegenerationabcm2ps
abc2svg

Do not put a staff system further than unit from the previous system.

sysstaffsep unit

Default Command lineScope Available in
36ptnonegenerationabcm2ps
abc2svg

Do not place the staves closer than unit inside a system.

maxsysstaffsep unit

Default Command lineScope Available in
2000ptnonegenerationabcm2ps
abc2svg

Do not place the staves further than unit inside a system.

The last ('sys') commands apply to all staves when global or in the tune header. Otherwise, they define the minimum/maximum vertical offset of the next staff.