Positioning Type
Positioning type for inserted species
	Positioning types for inserted species, as used by the 
    
    
        Add
    
 procedure node.
| Keyword | Description | 
|---|---|
| Central | On insertion, the species is shifted so that its centre of geometry is at the centre of the box. | 
| Current | No modification to the species coordinates are made on insertion. | 
| Random | On insertion, the species is translated to a random position within the box. | 
| Region | Use a specified region to control the locations into which species can be inserted. |