Saving Enhancing and Cropping on the Slide Tab

I must be a bit dumb but I am having trouble Saving Enhancing and
Cropping on the Slide Tab. After I have made the adjustments I press
the arrow down in the bottom right hand corner and do the same with
the next frame but when I make the slide show or the VCD nothing
seems to change. Am I missing Something ? I cant see any save button.
I would like to sort this out because I really like the Program.