[Help] Setting up drops

[FrozenIce500]

I have a couple of questions
1: what is " drop type " used for ?
2: how do i get "blue" items to drop ?
3: How can i get all mobs to drop all items ?

[MentaL]

[kennyman2000]

Droptype:
2 = Map, monster drops
1 = Monster drops
/\
| (Could be reverse, I don't know for sure)
|
\/
0 = Map Drops