I’m attempting to insert a new (3/4) first measure into an existing flow (no trouble) in Dorico Pro 4.2, and also to include a one-beat pickup to that first measure. The result: the first “full” measure has just two beats, compensating for the “stolen” beat of the pickup. This happens whether I use the right-side palette or a Shift-M entry of (“3/4,1”).
I’ve tried selecting the entire flow before adding the pickup, thinking it might then steal the beat from the final measure, but I get the same result.
If you already had another time signature in the next bar, that will be why – Dorico won’t create extra beats before an existing time signature unless Insert mode is active (as Dan described above).
Belated thanks to both of you for your helpful replies, Dan and Lille. I confess, I still had some difficulty, and don’t remember now how I finally got it to work. (I already had 80+ measure of music entered before deciding to add a measure with pick-up at the beginning.)
One more glitch now: the process seems to have left me with extra (unneeded) time signatures in successive measures at the end of the piece. They’re hidden by default, but I can’t delete them, and they break some multi-measure rests. I’ll keep working on it.
I only see signposts, not the actual time signatures — both at the beginning and end of the flow. They’re hidden, but apparently cannot be deleted. (They pop right back into existence when I try.)