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@@ -19,28 +19,48 @@ The design of bf-pd is based on the BOEUF conceptual framework which consists of
 
 ![doc/img/start.gif](doc/img/start.gif)
 
-- Create a declare object with -path bf-pd
-- Create a bf-instrument object with your instrument name as argument
-- Connect the sound output of your instrument to its inlet
-- Create a bf-param object for each control you want to share with the others and insert it into your instrument
-- Create a bf-session object with the name of the session you want to connect to
+Starting from an existing instrument made in PureData :
+
+1. Create a declare object with -path bf-pd
+2. Create a bf-instrument object with your instrument name as argument
+3. Connect the sound output of your instrument to its inlet
+4. Create a bf-param object for each control you want to share with the others and insert it into your instrument
+5. Create a bf-session object with the name of the session you want to connect to
 
 ## Performance: Making music together using bf-pd
 
 ### The collaboration window
 
-### Sharing parameters
+The collaboration window is a collaboration interface that comes with bf-pd and provides a way to connect your instrument with other instruments in the session.
+
+To open the collaboration window, simply check the *collab* toggle in the bf-instrument object.
+
+The leftmost green column shows your instrument with its outputs and parameters. The grey columns show the other instruments in the session with their respective activity, outputs and parameters.
+
+### Sharing / granting access
+
+By default, all your parameters are in the *granted* mode, which means that all the other musicians can set their values. You can of course change that by clicking the red *grant* toggle for each parameter, or the *grant all* toggle at the top of your column.
+If not granted, values *asked* by others are only displayed on the gray widgets and can be retrieved using the *1x* bang.
+
+### Using others parameters and outputs to change your parameters
+
+A *watch* bus selector is placed below each parameter and output of the other instruments. By choosing a bus other than 0, the values are sent to the corresponding bus and can be sent to your parameters connected to the same bus using the *watching* selector.
+
+### Controlling others parameters with your parameters and outputs
+
+Symmetrically, you can control others parameters by choosing a non-zero bus on the *ask* selector and the same *asking* bus below one of your outputs or parameters. This requires however that the parameter that you want to controlled is *granted* (i.e. that the green *granted* toggle is checked).
 
-### Connecting parameters using ask and watch
+### Directly asking / Controlling others parameters
 
+You can also ask another instrument's parameter to be set to a specific value by interacting with the white sliders/toggles/bangs. It the access is granted, the value will be directly set.
 
-### Video example 
+## Video example 
 
 <a href="https://vimeo.com/214380530">Video showing a simple session</a>
 
 ## More resources
 
-Documentation for each of the user objects in bf-pd can be found in [objects.md](doc/objects.md).
+Documentation for each of the user objects in bf-pd can be found in [objects.md](doc/objects.md) and on help patches directly in PureData (right-click an object -> Help)
 
 The *BOEUF conceptual framework* describes the *modes of collaboration* used in musical collaboration and describes a set of *components* for realizing these modes in a software framework. Bf-pd is based on this framework. More info can be found in [boeuf.md](doc/boeuf.md).