18.104.22.168 Clustering Displays
If you examine several variables at once, having a separate display for
each of them uses a lot of screen space. This is why DDD supports
"clusters". A cluster merges several logical data displays into one
physical display, saving screen space.
There are two ways to create clusters:
* You can create clusters _manually_. This is done by selecting the
displays to be clustered and choosing `Undisp => Cluster ()'.
This creates a new cluster from all selected displays. If an
already existing cluster is selected, too, the selected displays
will be clustered into the selected cluster.
* You can create a cluster _automatically_ for all independent data
displays, such that all new data displays will automatically be
clustered, too. This is achieved by enabling `Edit => Preferences
=> Data => Placement => clustered'.
Displays in a cluster can be selected and manipulated like parts of
an ordinary display; in particular, you can show and hide details, or
dereference pointers. However, edges leading to clustered displays can
not be shown, and you must either select one or all clustered displays.
Disabling a cluster is called _unclustering_, and again, there are
two ways of doing it:
* You can uncluster displays _manually_, by selecting the cluster
and choosing `Undisp => Uncluster ()'.
* You can uncluster all current and future displays by disabling
`Edit => Preferences => Data => Placement => clustered'.
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