I need to add slurs to the 16th notes only. I’ve been trying to select them on multiple staves at once, but the result is that the long notes are selected also (see pic). It seems that once there is a beam inside the selection rectangle everything that beam is connected to is also selected. I either have to add slurs stave by staves, or to deselect the long notes one by one. Is there a way to select only the notes inside the selection rectangle?