You are Polish?? maybe?? or Irish?? cos thats where everyone is coming from LOL...you are in construction?
Smoth 'preview' is on the keyboard yes, it gives you what it will look like when you actually use the smooth command in Mesh>Smooth...this smooth is permanent so be careful...if you smooth and save you CANNOT decrease the oly count in the object you have smoothed.
So some geo will be 'smoothed' for finals...and some will not be touched...ie just bevelled to make look smoth...but the geo isnt altered..Ok?
"A Darkness at Sethanon", a book I aspire to model some of the charcters and scenes