Paper blocks, using the ly:output-def-lookup function.įor instance, the line width (the same as the one used in scores) is The layout argument allows access to properties defined in The layout and props arguments of markup commands bring aĬontext for the markup interpretation: font size, line width, etc. When interpret-markup is called on a markup expression. The time \markup/ markup are interpreted.īut the actual conversion of markup expressions into stencilĮxpressions by executing the markup function bodies only happens TheĮvaluation and typechecking of markup command arguments happens at Into markup expressions already when \markup in a LilyPondĮxpression or the markup macro in Scheme is expanded. Markup expressions have their components assembled ThoseĪrguments are usually only known at a very late stage in Interpret-markup function on a markup expression, passing Quite often this is accomplished by calling the Markup command definition is responsible for converting theĪrguments of the markup command into a stencil expression which is Markup commands have a rather complex life cycle. The leading arguments of markup functions that take a markup as You avoid performance pitfalls by just using Scheme arguments for Since replicating the leading arguments for applying a markupįunction to a markup list is cheap mostly for Scheme arguments, Specified leading arguments) has been applied to every element of Result is a markup list where the markup function (with the Somewhat special as you can apply them to a markup list, and the Markup functions taking a markup as their last argument are There is no limitation on the order of arguments (after the any other scheme object, corresponding to type predicates such as.a list of markups, corresponding to type predicate.a markup, corresponding to type predicate markup?.Properties are used along with their default values.Īrguments are distinguished according to their type: The #:properties keyword can be used to specify which If the command uses properties from the props arguments, [ #:properties (( property1 default-value1)Ī list of associative lists, containing all active properties. (define-markup-command ( command-name layout props arg1 arg2 …) New markup commands can be defined using theĭefine-markup-command Scheme macro, at top-level. The one generated by the immediately following music expression, inĬontrast to \once which will affect all of those objects.īy using \single in this way any shorthand functionĬontaining just overrides may be applied to individual notes in aĬhord.This section discusses the definition of new markup commands. Noteheads in a chord), \single will only affect a single one, There are several objects at the same point in musical time (like In summary, \single converts overrides into tweaks so when Most of the rest of this chapter will be directed to presentingĮxamples of how it is used. \override is the most common command used in tweaking, and Invoked by prefixing the value with ‘ #’. Like numbers, symbols and lists are processed in ‘Scheme mode’, which is LilyPond’s primary expressions are musical items like notes andĭurations, as well as strings and markups. Understood in order to illustrate the format and use of these Use just a few simple properties and values which are easily Later sections deal comprehensively with properties and their We shall see later when it must be specified. Lyrics, and we shall omit it in many of the followingĮxamples. Level contexts, i.e., Voice, ChordNames or Required context is unambiguously implied and is one of lowest The Context may be omitted (and usually is) when the Layout object with the name LayoutObject, which is a member of This will set the property with the name layout-property of the Has to be modified, and what its new value is to be. Know precisely which property of which object in which context Internal properties deep within LilyPond its syntax is notĪs simple as the commands you have used so far. The command to change the properties of layout objects is We have already met the commands \set and \with, used toĬhange the properties of contexts and to remove and addĮngravers, in Modifying context properties, andĪdding and removing engravers. 5.1.4 Tweaking methods The \override command
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