Constraint status displays by default in the assembly browser as a
,
, or
to indicate one of three states:
Fully constrained A black dot indicates the component is fully constrained.

Under constrained A hollow dot indicates the component is under constrained and needs attention. To resolve, start by opening the Edit Constraint dialog box to identify possible issues.

Unknown A dash indicates the constrained status of the component is unknown. To resolve this state, rebuild the assembly: On the ribbon: Tools tab
Manage tab
Update panel
Rebuild All
.

Use the Display Preferences menu options to:
, and
)
The setting, Show Constraint State in Browser is also available from Tools
Manage
Document Settings
Modeling tab. By default, the setting is enabled.