anchor.diff:  [[sect_projects_layers_technical_properties]]
   ==== Technical Properties 
   
  -In the frame *Technical Properties*, the user may select the type of annation that will be made with this layer: span, relation or chain.
  +In the frame *Technical Properties*, the user may select the type of annation that will be made with this layer: span, relation, or chain.
   
   .Technical Properites
   [cols="1v,2", options="header"]
  
positive.code: | image:project_layer_type_chain.png[]
  |====
  
  For relation annotations the type of the spans which are to be connected can be chosen in the field *Attach to layer*. Here only non-default layers are displayed. To create a relation first the span annotation needs to be created.
  
  NOTE: Currently for each span layer there can be at most one relation layer attaching to it.
  
  NOTE: It is currently not possible to create relations between spans in different layers. For example if you define span layers called *Men* and *Women*, it is impossible to define a relation layer *Married to* between the two. To work around this limitation, instead create a single span layer *Person* with a feature *gender* what you can set to *Man* or *Woman*. Then you can define a relation layer *Married to* attaching to the *Person* layer.
  
  [[sect_projects_layers_behaviours]]
  ==== Behaviours
  
negative.code: 
  image::project6.jpg[align="center"]
  
  Choose a document by clicking on *Choose Files*. Please mind the format, which you have to choose above. Then click on *Import Document*. 
  The imported documents can be seen in the frame below.
  To delete a document from the project, you have to click on it and then click on *Delete* in the right lower corner.
  
  