Cold Conditioning?

So im sure its covered somwhere in here, but when you cold condition such as with a lager (im doing a Kolsh) do you do that in a fermenter or is that like a form of bottle conditioning. I have been out of beer brewing for over a year and i am planning my return by getting the equipment to go all grain. I beleive if it is done in the fermenter that more yeast would have to be added before bottling. What is y'alls verdict. Im Planning aroung a 38 degree cold condition period.

lagering is done in a fermenter.

No more yeast have to be added. You will have more than enough in suspension for bottle conditioning.