Different length notes on one stem

Violin.

What I’d like is: top note a minim (half-note) with a tremolo (the tremolo is fine); on the same stem, and lower in pitch, two further notes, notated as crotchets (quarter notes), everything stem up. I hoped I might manage it using two up-stem voices and extending the stem on the lower voice, but the lower voice promptly moves to one side once it clashes with the minim.

Any ideas on how I achieve this? I can’t find this in the manual but it’s hard to know where to look.

If you want multiple upstem voices to line up, I’m thinking you need to set voice column index to 0. That’s in Engrave.

Brilliant. That’s done it. Thanks!

I’d like to know if there is any news (as per 3.5) on this subject: is this graphical tweaking still the only possibility to get - say - a 1/4th note and a half note to the same stem?

Yes.