About Displaying the Original Components of Composite Solids

    About Displaying the Original Components of Composite Solids

    Composite objects, which are objects created with Boolean operations, retain a history
    of their original object components that can be displayed and modified.

    Retain the History of the Composite Components

    You can modify the shape of a composite object by modifying a highlighted wireframe
    image of its original components. If the Show History property is 1 (On), wireframes
    of the original forms—including forms that have been removed—are displayed in a dimmed
    state. (The SHOWHIST system variable also controls this setting.)

    To retain a history of the original parts of composite solids, the History property
    must be set to Record (On) in the Properties palette when the Boolean operation occurs.
    You can also use the SOLIDHIST system variable to set this property.

    Display and Remove the History to Modify the Composite

    When you modify the composite object, you can display the history. Then use the grips
    on the history subobject to modify the object.

    You can remove the history of a selected composite object by changing its History
    setting to None, or by entering the BREP command. After a history has been removed,
    you can no longer select and modify the original, removed, components of the solid.
    You can restart history retention for the solid by changing its History setting back
    to Record.

    Removing a composite history is useful when you work with complex composite solids.
    With this process, you can create a complex composite object, and then reset the history
    to serve as a new starting point for additional composite operations.

    Learning AutoCad

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