Hello,
I'm not an expert on this, but it seems to me I've done it in the past: Try dragging the Tracks View note with your mouse, out to the desired distance. If that doesn't work, try going into the notation window and creating some longer notes there. I'm pretty sure you can get good results doing one or the other. Personally, I tend to lean toward the notational changes. I know that notes get positive results. smiles. Hope this helps.
Griff