This Display menu command hides each selected object from view without changing its geometric role in the sketch. Use this command to hide objects that shouldn’t be seen, but that are still required for geometric purposes in the sketch. When an object is hidden, it remains present in the sketch and can continue to define the position and behavior of other objects that remain visible.
The keyboard shortcut for Hide is Ctrl+H (Windows) or H (Mac).
If you have objects in your sketch that you don’t want to see and that are not required for geometric reasons, it’s better to clear those objects using the Backspace key or the Edit | Clear command than to hide them.