up/down stem unison move

Silly question time…

If I have a unison in up and down stem voices, how do I move one of those notes with alt-arrow?
I expected to move them both with no voice selected, but if I have a down stem voice selected, I would expect just the down stem voice to move.

The caret voice indicator doesn’t affect the selection - you need to select the one you want to move. The easiest way is often to select the stem. You won’t get any visual feedback, so it can sometimes be hard to know which one you have selected. You can use Edit -> Filter to get more precise control over the selection

Select the stem…! That worked. Thank you.