Re: How to attach markup to several notes

[Kaj]

On 2017-05-09 at 14:15, Ivanov Dmitry wrote:
> > Hi Ivanov!
> > I understand that you want a function which puts your text exact at 
> > the midpoint between the notes, but...
> > Else is the simplest to just displace your text some distance. But of 
> > course, then you have to calculate the midpoint yourself.
> >
> > \version "2.18.2"
> > \relative f'{
> > f8_\markup { \translate #'(0.8 . 0) F} <a c f>
> > }
> > Kaj
>
> Hello. Can you explain the meaning of this:
>
> f8_\markup - start the markup below the note f8
>
> {
>  \translate -- call "translate" function
>    #' - what's this?
>    (0.8 . 0) - parameter passing. But what is the syntax?
>  F - text "F"
> }
Hello Ivanov
As you see, compared to your own code I just added a call for a 
function, which moves the text some distance from its original place, 
which is just under the first note f. The displacement is the two 
numbers in the parenthesis 0.8 in the X direction (horizontally) and 0 
(zero) in the Y direction (vertically). This a special data type, a pair 
of numbers, and must be separated by a dot, which in turn has to be 
surrounded by spaces ( to not be mistaken for a decimal point). The hash 
mark (#) is the syntax for entering values to almost any function, for 
the programming language Scheme to recognize it as a value. The 
apostrophe says it is not a string (which is surrounded by double 
quotes) but another kind of value. The unit for the displacement is the 
space between the staff lines.

Myself I am far from an expert, so someone might come back and correct 
what I have written. In the Notation Reference you have examples and a 
better explanation:
http://lilypond.org/doc/v2.18/Documentation/notation/formatting-text#text-alignment

If you have not yet read the Learning Manual I recommend you to do so. 
You will discover some of the structure in programming LilyPond.
/Kaj