Centering a stencil on another stencil
If you want to re-position a stencil so that it is centered relative to another stencil, on the X axis, the Y axis, or …
…stil-a stil-b #:optional axis) "Return a copy of stencil @var{stil-b} that has been moved so it … …stencil #(ly:stencil-add square (center-stencil-on-stencil square blue-square X)) \stencil #(ly:stencil-add square (center-stencil-on-stencil square blue-square Y)) \stencil #(ly:stencil-add square (center-stencil-on-stencil square blue-square)) }