LilyPond Beginnershandleiding

Hoofdstuk 4: Tweaking output 120
3. Finally, when all else fails, objects may be manually repositioned relative to the staff center
line vertically, or by displacing them by any distance to a new position. The disadvantages
are that the correct values for the repositioning have to be worked out, often by trial and
error, for every object individually, and, because the movement is done after LilyPond has
placed all other objects, the user is responsible for avoiding any collisions that might ensue.
But the main difficulty with this approach is that the repositioning values may need to be
reworked if the music is later modified. The properties that can be used for this type of
manual repositioning are:
extra-offset
This property applies to any layout object supporting the grob-interface. It
takes a pair of numbers which specify the extra displacement in the horizontal
and vertical directions. Negative numbers move the object to the left or down.
The units are staff-spaces. The extra displacement is made after the typesetting
of objects is finished, so an object may be repositioned anywhere without
affecting anything else.
positions
This is most useful for manually adjusting the slope and height of beams, slurs,
and tuplets. It takes a pair of numbers giving the position of the left and right
ends of the beam, slur, etc. relative to the center line of the staff. Units are
staff-spaces. Note, though, that slurs and phrasing slurs cannot be repositioned
by arbitrarily large amounts. LilyPond first generates a list of possible positions
for the slur and by default finds the slur that “looks best”. If the positions
property has been overridden the slur that is closest to the requested positions
is selected from the list.
A particular object may not have all of these properties. It is necessary to go to the IR to
look up which properties are available for the object in question.
Here is a list of the objects which are most likely to be involved in collisions, together with
the name of the object which should be looked up in the IR in order to discover which properties
should be used to move them.
Object type Object name
Articulations Script
Beams Beam
Dynamics (vertically) DynamicLineSpanner
Dynamics (horizontally) DynamicText
Fingerings Fingering
Rehearsal / Text marks RehearsalMark
Slurs Slur
Text e.g. ^"text" TextScript
Ties Tie
Tuplets TupletBracket
4.5.2 Fixing overlapping notation
Let’s now see how the properties in the previous section can help to resolve overlapping notation.
The padding property
The padding property can be set to increase (or decrease) the distance between symbols that
are printed above or below notes.
c2\fermata
\override Script.padding = #3