Hi,
In order to prevent re-triggering of long notes (which happens if you join eg: 2 semibreves with a tie) I use the alt-shift-right arrow combination which works great.
Downside of this approach is if you want to put dynamics somewhere along the note -eg: a diminuendo near the end to show that the note should die away.
Is it possible in write mode or is this an Engrave mode only thing?