Fratveno thank you
I searched around Q and L before asking here to no avail
the exact sequence is
select the note
then enter the chord tones
to enter lower chord tone Contr+Alt
SpaceBar to next starting note
while doing this I entered in a strange situation where the L icon was off but the Lock duration state was still functioning. Couldnt reproduce ...
ASUS P7P55WS; 12GB; kingston SSD 120GB; Win10 pro 64; RME multiface; Sibelius 8; Dorico 1.030; Cubase Artist 7.5 ; Melodyne; Adam S2-A.
My native language is french, my english SoSo...