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Creation - Markov chain:
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1/ USING the button bar:

This button bar contains 10 buttons:

   - Node:
     Click on this button then on the panel to create a node.  

   - Arc:
     Click on this button then on the panel to create an arc.  
   
   - Modif. Arc:
     Click on the button "Modif. Arc", then at that time, the intermediate points of the current
     arcs in the models appears as a black rectangle. You can move these intermediate points by clicking
     on it then dragging the mouse and releasing in the new location. You can also create new intermediate
     points by clicking on an arc then dragging the mouse, an new intermediate point is now displayed.	   

   - Rate Matrix:
     Click on this button then a frame appears on the screen.
     This is used to enter the rate values of each of the already created arc, as well as for arcs that have not been yet implemented.
     The yellow rectangles show the arcs already implemented but which don't have a rate value at the current time.
     Values entered in each of the white rectangles inside the grid will generate new arcs in
     the panel after the dialog box has been exited. The button "add" creates a new node (state) and
     enters a new column and row inside the grid.
     A new node will also appears on the screen after this action. Because it is difficult to know where to
     insert the new node in a good location, the node will be placed on the top left of the panel.
     If more than one node is created with the button "add", the new nodes will be located in the 
     same spot. Each new node can be moved to the desired position after leaving the 
     dialog box (clicking the button "OK").      
   
   - Copy:
     The user can select the part of the design, he wants to copy.
     By pressing the mouse on the panel then dragging the mouse and releasing it,
     a rectangle with green border is now displayed on the screen with the nodes contained
     in this rectangle now with the yellow color.
     Click now on the button "Copy".
   
   - Paste:
     After the user has copied or cut a part of the model by creating a rectangle,
     the action "Paste" is now available and the user after clicking on the button "Paste" needs to
     click on the Panel where he wants to have the new objects (nodes/arcs) to be pasted.	
   
   - Cut:
     The user can select the part of the design, he wants to cut.
     By pressing the mouse on the panel then dragging the mouse and releasing it,
     a rectangle with green border is now displayed on the screen with the nodes contained
     in this rectangle now with the yellow color.
     Click now on the button "Cut".

   - Delete:
     Click on the button "Delete", then click on an object (node or arc) to have this object
     deleted. If you delete a node, all the arcs connected to this node will also be deleted.

   - Move:
     Click on this button then click on an object (node) or 
     on a object's label then drag it to move it.     

   - Clear:
     Click on the button "Clear" to clear the current model. 
     A frame appears on the screen and the user should confirm this action by
     clicking on "Yes".


2/ USING the popups:

After creating a "Markov chain" model, the user should design his/her model by clicking on the panel 
with the right button of the mouse. 

The principle is to click of an object with the right button of the mouse then choose the action which
should change the current design.

All the methods are explained in the "Methods/Actions" part.

