It seems that the (otherwise wonderful) implementation of lines does not yet work well with empty bars marked as a slash region.
A lead sheet I’m working on includes a lot of empty bars defined as a slash region. I’m trying to add a line attached to a rhythmic position indicated by the slashes in the slash region - like in the attached screenshot.
I select the slashes above which I’d like the line to appear, click the line symbol - but the line is drawn above the entire slash region instead of above the selected area. Similarly, there’s no way I can move the line start/end markers to the correct location (in the attached example it would have made sense to at least allow modifying the line start/end position in quarter notes, where the slashes appear).
I ended up adding dummy notes where I wanted my line to start and end, but this looks like something that needs to be fixed.