There are two ways to play through your shots and point tracks: Playblast movies and the Time Slider.
Playblasts and Pointblasts are movies Live creates in system memory and displays in a Movieplayer window. The Movieplayer has standard playback buttons, and you can scrub through the sequence by click-dragging right to move forward or left to move backward.
Playblast and Pointblast are efficient, but they are not dynamic because of the time it takes to create the movies.
At the bottom of the Maya window are the Time Slider playback tools. By default, Live uses an image cache to run the Time Slider so that it plays from fast system memory. However, if you do not have enough system memory or you do not set up the image cache, the Time Slider may be too slow. See Set up image cache for more information.