The Dystopian OLC guide
An area contains a few simple details, as well as a set of global flags, which can be toggled on/off by any level 12 immortal (you'll have to ask to get these global flags enabled).

Area Data

Filename the filename under which the area is saved.
Music the midi file which is played as background music.
Builders the list of players that are allowed to edit the area.
Filename the filename under which the area is saved
Vnums the rang of valid vnums for that area
Flags These global flags are explained below and affect the entire area.

 
Global Area Flags

No travel to mobs The class travel powers will not work on mobs in this area.
Increased Regen Increases the regen rate of playes in the area by 25%
Decreased Regen Decreases the regen rate of playes in the area by 25%
No Magic Makes it impossible to cast spells (even with objects) in that area
No Home Playes cannot home in that area

It is very likely that most of the flags above has not been implanted yet, though it should not be considered much of a challenge to write the small bits of code needed, the olc-stuff is already coded.

How to use the `aedit' command

To create and change area files, you need to use the aedit command. This command takes a very few simply arguments, and the syntax is
aedit [create] area ID
Where the create argument only is given when a new area is to be created. Once you are in aedit mode, you can use the following commands to modify the area to your liking.

music Set the background midi file.
builders Add or remove a builder for this area.
filename Set the filename the area is saved as.
name Set the name of the area as it is shown on the list.
show Show the current settings.
vnum Set the vnum range for this area (e.g. vnum 1400 1499).