you can significantly decrease load time by UN-checking "auto-key" in the animation palette menu. Then you need to delete all the keyframes -- hit the minus sign next to the key picture. This is, of course, assuming that you're working on a still image and not an animation. The auto-key option is turned on by default: whenever you create an object, it allocates a big swath of space to track the changes that the object might make in the future. Since you're not doing an animation, this is just useless garbage. The behavior of the auto-key function is wacky... turn it off (and delete the keyframe it's already created at time 0:00). Turning off auto-keying can save over 50% of the time it takes to load up the image: in some case 90%. Your file size will shrink, too. Another technique for editing quickly is to work in Solo mode. Select only the stuff you're interested in, and then hit solo mode: your re-draws will be much quicker, and you won't be distracted by the rest of the stuff on screen.