Creo Illustrate Animation edit

Hi,

Can anyone suggest the best way to edit an animation I have created?

I have had to removed some now unwanted parts that I had animated (i.e. bolts with an unscrewing effect) but I now need to edit the duration of that section as the animation looks like its doing nothing for this duration? Can I just cut out a section of the track length or the top level Animation track and if so, how??

Thanks for any help,

Brian