To Detect Open Ends of Entities
Use the Highlight Open Ends diagnostic tool to highlight the endpoints of entities that do not coincide with endpoints of other entities in an active sketch or an active sketch group. Open endpoints are highlighted in red. In 3D sketch geometry only the open ends of valid entities are highlighted. Open ends of construction geometry are not highlighted.
Open endpoints of entities are highlighted by default. To disable the Highlight Open Ends tool, perform one of these operations:
• Click > > 
Highlight Open Ends.
Highlight Open Ends.In 2D Sketcher, click > 
Inspection Tools > Highlight Open Endsor click > Highlight Open Ends.
Inspection Tools > Highlight Open Endsor click > Highlight Open Ends.• On the Graphics toolbar, click Inspection Tools Display Filters > Highlight Open Ends.
Inspection Tools Display Filters > Highlight Open Ends.• Click > 
Options > > .
Options > > .• Set the sketcher_highlight_open_ends configuration option to no.