Adding a little Twinkle

Hey everybody, just thought I'd chime in here.  First I'd like to say that it's surprising that Storyline 3 still doesn't seem to have any built-in highlight tools. But inspired by this thread, I found something simple that works nicely for me.  At the relevant point in the video, I add a rectangle with no fill with a large glow and outline to match.  I animate it in with a wheel animation over 1.25 seconds, and it gives a nice "Look here!" effect. And in working with videos, I still haven't found an easy way to add an object for a short duration.  The first one I add, I end up going to the end of the timeline, then dragging the endpoint back to where I want it (which takes a long time.) From then on I just duplicate and edit, but it seems like there should be an easier way to say "I want something to appear for 2.5 seconds (not 2.5 minutes.)