My program area is too big, it goes off the screen where the preview effects etc...should be on the far right. I tried everything and it won't come back on? Any ideas?
It sounds like you need to reset your workspace. You'll find the command under the windows category at the top.
If Dave's suggestion doesn't help you, please provide more information. Screenshots would be helpful. What screen resolution you have, what OS you are using, what GPU, etc.