When you first load a world, a configuration file will be generated and put at .minecraft/mods/sppcommands/worldedit.properties. You can configure various WorldEdit settings with this file.
|wand-item||integer||271||ID of the item to use for the wand, a tool that allows the selection of points by left or right clicking. The default is set at a wooden axe.|
|shell-save-type||bash or bat||Batch file type to use. This is used by the /delchunks command.|
|debug||true/false||false||If enabled, the amount of time that a command takes to complete will be printed after each command.|
|max-blocks-changed||integer||-1||A limit of blocks that can be changed in one operation. If you just want to set a default value, use default-max-blocks-changed. A value of -1 indicates no limit. Since a long operation will freeze your game, you can use this to halt operations that change too many blocks.|
|default-max-blocks-changed||integer||-1||The default block change limit. If this value is higher than the maximum as specified by max-blocks-changed, the maximum overrides. A value of -1 indicates no default limit.|
|max-radius||integer||-1||The maximum radius that can be used for the commands that take a radius parameter. Use -1 for no limit.|
|max-super-pickaxe-size||integer||5||The maximum useable size for the super pickaxe.|
|disallowed-blocks||list of block IDs||(a long list)||List of block and items that cannot be used. Note that the //stack command does not obey this configuration.|
|use-inventory||true/false||false||Not supported in single player.|
|use-inventory-override||true/false||false||Doesn't apply to single player.|
|log-commands||true/false||false||Choose to log used commands to console. Doesn't apply to single player.|
|super-pickaxe-drop-items||true/false||true||Drop items with the single super pickaxe.|
|super-pickaxe-many-drop-items||true/false||false||Drop items with the non-single block super pickaxe modes. Note that these other modes may destroy a lot of blocks and thus drop an excessive amount of blocks.|
|snapshots-dir||string||Directory to read snapshots from. Unless an absolute path is specified, this directory is relative to the bukkit server .jar file.|
|nav-wand-item||integer||345||Item to bind /jumpto. Normally this works by letting you swing at a location to go there, but currently in Bukkit you will have to right click. Default item is the compass.|
|nav-wand-distance||integer||50||Maximum distance for the wand to work with.|
|scripting-timeout||integer||3000||The number of milliseconds to let CraftScripts run for at most.|
To reload WorldEdit's settings, you have to quit your current game and load up your world again.
Inventory support does not exist in the single player version of WorldEdit.