Working in timeline view

>I created a very simple slideshow with about 150 pictures and one single
> music track. When I am editing in timeline view and trying to sync
> pictures
> with specific points on the audio clip, I am able to pause the clip where
> I
> want to edit but when I click on the picture to move it to the point where
> i
> want it to be synced up with the audio, the whole timeline shifts back to
> the
> very begining of the slideshow and then i have to scroll back to the point
> in
> the slideshow where i want to sync the picture with the audio and kind of
> "guess" where I want them to sync up. Is there anyway to actually mark the
> point in the audio clip where i want to sync the picture to?
>
> Thanks in advance
>
>