You can obtain a textual representation of a particular display by clicking the
button. Alternatively you
can use File->Record to get a dump of the full particulars of a
specific network record.Context
You can bring up the Variable Context
window, then click on a variable and be taken to that point in the network. There are two
modes of display for the Context window. Use the radio box to set listing of logical
environment variables and included variables or listing of all variables.
Entering a Shell
Use Ctrl while clicking on a shell not at the centre of the display. This will allow you
to enter the shell and observe its internal structure.
Displaying a Particular Node
You can use File->Node to put in the number of a specific node in the
network. You can also enter the number for a link.
Getting More Details
You can obtain a textual representation of a particular display by clicking the button. Alternatively you
can use File->Record to get a dump of the full particulars of a
specific network record.
Navigating through the Network
You can set up the conditions for navigation, then press the 
Navigate
button and move rapidly through the network. A simple and effective criterion is DCN NODE,
so all variables directly connected to the current centre node are displayed.
Operator Help
Double clicking on an operator will bring up the Help page for the operator. Logical
operators such as AND, IMP etc. may be set to use Bayesian
behaviour. A dialog box will appear, allowing you to check the box for Bayesian
behaviour.
Some network operators, such as DISTRIB and RELATION, hold graphs inside themselves. Double clicking on them will cause the internal graph to be displayed.
Setting a Variable
Double clicking on a variable will bring up a dialog box, allowing you to set the value.
Viewing Link Information
Double clicking on a link will bring up a dialog box, displaying information on the value
in the link. You cannot change the information, but you can set Diode Behaviour.
Setting Diode Behaviour
Links can be set to behave as though they had directional control of information flow.
Double click on the link, then set the radio button to None, Input
or Output (relative to the centre node). If diode behaviour is set, a
small black arrow will appear on the link, indicating the only possible direction of data
flow and killing. If two small arrows are drawn on the link, it indicates that the link is
fixed in its state and value (and cannot be killed).
Tracing an Error to its Source
If the operator or variable at the centre of the window has a UKE or Error state, you can
use the Odd Jobs->Trace Source button to find the source of the error
(only works if there is a single input of error).