Merging multi-measure rests in a polyphonic part
When using multi-measure rests in a polyphonic staff, the rests will be placed differently depending on the voice they belong to. However they can be printed on the same staff line, using the following setting.
\version "2.24.0"
normalPos = \revert MultiMeasureRest.direction
{
<<
{
c''1
R1
c''1
\normalPos
R1
}
\\
{
c'1
R1
c'1
\normalPos
R1
}
>>
}