Add a few notes on air.

2 files changed, 5 insertions, 2 deletions

diff --git a/Chat Commands.md b/Chat Commands.md
index 08adbaf..e44f242 100644
--- a/Chat Commands.md
+++ b/Chat Commands.md
@@ -66,6 +66,7 @@ Display the volume of the current WorldEdit region.
 

 Set the current WorldEdit region to <node>.

 

+    //set air

     //set cactus

     //set Bronze Block

     //set mesecons:wire_00000000_off

@@ -74,7 +75,7 @@ Set the current WorldEdit region to <node>.
 

 Replace all instances of <search node> with <replace node> in the current WorldEdit region.

 

-    //replace Cobblestone cactus

+    //replace Cobblestone air

     //replace lightstone_blue glass

     //replace dirt Bronze Block

     //replace mesecons:wire_00000000_off flowers:flower_tulip

@@ -83,7 +84,7 @@ Replace all instances of <search node> with <replace node> in the current WorldE
 

 Replace all nodes other than <search node> with <replace node> in the current WorldEdit region.

 

-    //replaceinverse Cobblestone cactus

+    //replaceinverse Cobblestone air

     //replaceinverse flowers:flower_waterlily glass

     //replaceinverse dirt Bronze Block

     //replaceinverse mesecons:wire_00000000_off flowers:flower_tulip

diff --git a/README.md b/README.md
index 764806e..ee1646c 100644
--- a/README.md
+++ b/README.md
@@ -48,6 +48,8 @@ Second, by name - the node name that is defined by code, but without the mod nam
 
 Finally, by full name - the unambiguous identifier of the node, prefixes and all. This is case sensitive and includes values such as "default:stone" and "mesecons:wire_00000000_off".
 
+The node name "air" can be used anywhere a normal node name can, and acts as a blank node. This is useful for clearing or removing nodes. For example, `//set air` would remove all the nodes in the current WorldEdit region. Similarly, `//sphere 10 air`, when WorldEdit position 1 underground, would dig a large sphere out of the ground.
+
 Regions
 -------
 Most WorldEdit commands operate on regions. Regions are a set of two positions that define a 3D cube. They are local to each player and chat commands affect only the region for the player giving the commands.