cross-staff stems

[Mark Stephen Mrotek]

Hello!

 

My piano score has four voices each coded as a variable.

At a single place I want a cross stem between the tenor and alto voice.

The directions at
https://lilypond.org/doc/v2.16/Documentation/notation/common-notation-for-keyboards#cross_002dstaff-stems

were followed  yet the stems were not created.

 

The snippet for the above directions does not use variables yet imbeds the notation within the \PianoStaff.

Does imply that cross-staff stem is available only in that format?

 

Thank you for your kind attention,

 

Mark