diff --git a/display_api/API.md b/display_api/API.md
index 0d52e29..b214585 100644
--- a/display_api/API.md
+++ b/display_api/API.md
@@ -11,7 +11,7 @@ This method triggers entities update for the display node at pos. Actual entity
 ### register\_display\_entity
 **display\_lib.register\_display\_entity(entity_name)**
 
-This is a helper to register entities used for display. 
+This is a helper to register entities used for display.
 
 `entity_name`: Name of the entity to register.
 ## Provided callback implementations
@@ -26,7 +26,7 @@ This is a helper to register entities used for display.
 ### on_destruct
 **display\_lib.on_destruct(pos)**
 
-`on_destruct` node callback implementation. Display nodes should have this callback (removes display entities on node destruction). 
+`on_destruct` node callback implementation. Display nodes should have this callback (removes display entities on node destruction).
 ### on_rotate
 **display\_lib.on\_rotate(pos, node, user, mode, new_param2)**
 
@@ -34,22 +34,20 @@ This is a helper to register entities used for display.
 ### on_activate
 **display\_lib.on_activate(entity, staticdata)**
 
-`On_activate` entity callback implementation for display entities. No need of this method if display entities have been registered using `register_display_entity` (callback is already set). 
+`On_activate` entity callback implementation for display entities. No need of this method if display entities have been registered using `register_display_entity` (callback is already set).
 
 ## Howto register a display node
 * Register display entities with `register_display_entity`
 
 * Register node with :
   - `on_place`, `on_construct`, `on_destruct` and `on_rotate` callbacks using display_api callbacks.
-  
-  - `display_modpack_node` group. This will make this node have their entities updated as soon as the mapblock is loaded (Useful after /clearobjects).
-  
+  - `display_api` group. This will make this node have their entities updated as soon as the mapblock is loaded (Useful after /clearobjects).
   - a `display_entities` field in node definition containing a entity name indexed table. See below for description of each display_entities fields.
 
 ### Display_entities fields
 `on_display_update` is a callback in charge of setting up entity texture. If not set, entity will have no texture and will be displayed as unknown item.
 
-`depth`, `right` and `height` : Entity position regarding to node facedir/wallmounted main axis.
+`depth`, `right` and `height`: Entity position regarding to node facedir/wallmounted main axis.
 Values for these fields can be any number between -1.5 and 1.5 (default value is 0).
 Position 0,0,0 is the center of the node.
 `depth` goes from front (-0.5) to rear (0.5), `height` goes from bottom (-0.5) to top (0.5) and `right` goes from left (-0.5) to right (0.5).
@@ -61,12 +59,12 @@ In order to avoid flickering text, it's better to have text a little behind node
 	display_api.register_display_entity("mymod:entity1")
 	display_api.register_display_entity("mymod:entity2")
 
-	function my_display_update1(pos, objref) 
+	function my_display_update1(pos, objref)
 		objref:set_properties({ textures= {"mytexture1.png"},
 		                        visual_size = {x=1, y=1} })
 	end
 
-	function my_display_update2(pos, objref) 
+	function my_display_update2(pos, objref)
 		objref:set_properties({ textures= {"mytexture2.png"},
 		                        visual_size = {x=1, y=1} })
 	end
@@ -75,13 +73,13 @@ In order to avoid flickering text, it's better to have text a little behind node
 		...
 		paramtype2 = "facedir",
 		...
-		groups = { display_modpack_node = 1, ... },
+		groups = { display_api = 1, ... },
 		...
 		display_entities = {
-			["mymod:entity1"] = { 
+			["mymod:entity1"] = {
 				depth = 0.3,
 				on_display_update = my_display_update1 },
-			["mymod:entity1"] = { 
+			["mymod:entity1"] = {
 				depth = 0.2, height = 0.1,
 				on_display_update = my_display_update2 },
 			},