(Noticed in MusE 0.7.1 - 0.7.2pre2:)
With the pencil tool one can make notes longer that
already exist in the piano roll editor. One can make
notes longer by pulling the right edge of the note to
the right. But it is not possible to a make a note
longer by pulling the left edge of the note to the left.
As a workaround one needs to drag the note itself to a
new position left from the actual note position, and
then use the pencil to make the note longer at its
It would be easier to just make the note longer by just
being able to drag the left edge of the note to the left.