The Highlight Leaf option in popup menus enables you to identify a component or feature by selecting it in the graphics area.
When an assembly is activated, selecting a component in the graphics area will highlight the component in the Assembly Tree.
When a component is activated, selecting a feature in the graphics area will highlight the feature in the Feature Tree.
Example:
Select the Highlight Leaf option in one of the popup menus.
Notes:
This example shows an Assembly component, however, the Highlight Leaf option is also available for the Modeling application.
This example shows the Highlight Leaf option being selected first and then the entity being picked. This option also works if you pick the entity first and then select the Highlight Leaf option.

Assembly is activated.
Select a component in the graphics area.

When an assembly is activated, selecting a component in the graphics area will highlight the component in the Assembly Tree.

Component is activated.

When a component is activated, selecting a feature in the graphics area will highlight the feature in the Feature Tree.