Select the part or parts you want to hide.
Go to the "Category" page in the Design Director.
Right-click and choose "New Graphics Category" from the palette Local Menu.
Give it a name.
Turn the 'eye' off to hide the selected parts. This doesn't affect other objects on that layer(s).
You can select other objects and add them to the Category by clicking on the plus +
You can remove selected objects by clicking on the minus -
You can right-click on one or more Category names and choose "Select By" to see what objects are is in the Category.
The "Graphic" page in the DD
only allows one object to be used.